(JBE Vol. 23, No. 1, January 2018) (Special Paper) 23 1, (JBE Vol. 23, No. 1, January 2018) ISSN 2287-

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1 (JBE Vol. 23, No. 1, January 2018) (Special Paper) 23 1, (JBE Vol. 23, No. 1, January 2018) ISSN (Online) ISSN (Print) - a), a) A Scheme of Efficient Contents Service and Sharing By Associating Media Server with Location-Aware Overlay Network Won-Ho Chung a) and Seung Yeon Lee a).,.,.,,. -,.. ABSTRACT The recent development of overlay network technology enables distributed sharing of various types of contents. Although overlay network has great advantages as a huge content repository, it is practically difficult to directly provide such Internet service as streaming of contents. On the other hand, the media server, which is specialized in content services, has excellent service capabilities, but it suffers from the huge contents that are constantly created and requires large expansion of severs and storages, and thus requires much effort for efficient management of the huge repository. Hence, the association of an overlay network of huge storage with a media server of high performance content service will show a great synergy effect. In this paper, a location-aware scheme of constructing overlay networks and associating it with media server is proposed, and then cache-based contents management and service policy are proposed for efficient content service. The performance is analysed for one of the content services, streaming service. Keywords : Location-Awareness, Media server, Ordinary-Peer, Overlay Network, Super-Peer Copyright 2017 Korean Institute of Broadcast and Media Engineers. All rights reserved. This is an Open-Access article distributed under the terms of the Creative Commons BY-NC-ND ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited and not altered.

2 1: - (Won-Ho Chung et al.: A Scheme of Efficient Contents Service and Sharing By Associating Media Server with Location-Aware Overlay Network) I.,, [1,2]. [3-5].. [6,7]....,.,., a) (Dept. of Digital Media, Duksung Women s University) Corresponding Author : (Won-Ho Chung) whchung@duksung.ac.kr Tel: ORCID: * Manuscript received November 10, 2017; Revised November 23, 2017; Accepted November 23, ,.. -,., JiTUL(Justin-Time UpLoad)., MLRU(Modified Least Recently Used).. II..,., API, [4,5,8].

3 (JBE Vol. 23, No. 1, January 2018),. IoT IoT [7].,.,. 2, (Ordinary-Peer, OP), (Super-Peer, SP).. trade-off [9], Gossip [10-12]. [13]. [14],,., SP, OP,. III. - OP SP SP. SP OP OP SP OP, OP. OP SP. SP SP.. ID. - SP OP - 4. [-1] 3-, { }., 1),, 2) &,, 3) & &,. 4). [-1] 3- [15]. [-1]

4 1: - (Won-Ho Chung et al.: A Scheme of Efficient Contents Service and Sharing By Associating Media Server with Location-Aware Overlay Network).. 3, 2 1,, [-1] OP SP Algorithm SPSelect. OP SP SP., S = {(82,51,7574), (1,221,2754), (82,2,5280), (1,421,213), (1,907,432), (82,2,573), (61, 7, 453), (82, 2, 548)}. OP, = (82, 2, 5280), classify_sp() max = {(82, 2, 5280)}, = {(82, 2, 573), (82, 2, 548)}, min = {(82, 51, 7574)} = {(1,221,2754), (1,421,213), (1,907,432), (61, 7, 453)}. SP = (82, 2, 5280). max, SP, min SP. [ 1]. For and, classify_sp(s, p) ; if( max ) return ( any max ) ; if( ) return ( any ) ; if( min ) return ( any min ) ; return ( any ) ; classify_sp(s, p) { for(i=0; i<k ; i++) { // Find a set of SP s in min, med and max proximity if ( == ) // p and are in the minimum-proximity relation if ( == ) // p and are in the medium-proximity relation if ( == ) // p and are in the maximum-proximity relation append( max, p) ; // closest proximity neighborhood relation else append(, p) ; // closer proximity neighborhood relation else append( min, p) ; // close proximity neighborhood relation else append(, p) ; // no neighborhood relation } }

5 (JBE Vol. 23, No. 1, January 2018) 1. OP SP Fig. 1. Association an OP with the SP of maximum proximity in given example 3. SP SP, SP. SP SP SP SP. SP. [-1] SP Algorithm SPSelect. Algorithm SPOrganize. SP, SP SP. max SP, SP, min SP. OP SP 2. () () Fig. 2. Association with SP s of either maximum proximity(bold line) or minimum proximity(dotted line) For and, classify_sp(s, p) ; if (( max ) & (MinConnect == TRUE)) return max ; if (( ) & (MedConnect == TRUE)) return ; if (( min ) & (MaxConnect == TRUE)) return min ; return ;

1: - (Won-Ho Chung et al.: A Scheme of Efficient Contents Service and Sharing By Associating Media Server with Location-Aware Overlay Network) SP SP. [ 2] SP, () (). IV.

6 1: - (Won-Ho Chung et al.: A Scheme of Efficient Contents Service and Sharing By Associating Media Server with Location-Aware Overlay Network) SP SP. [ 2] SP, () (). IV. [ 3], OP, SP, (Gate-Peer, GP), 3,. [ 3] SP. 1. SP SP-(SPB) OP-(OPB). OPB IP, - OP, SP OP 3. Fig. 3. Architecture of the proposed overlay network 4. 2 OPB Fig. 4. OPB structure with 2D linked-list

7 (JBE Vol. 23, No. 1, January 2018), [ 4] OP, OP 2. OP SP OPB OP, OP. SP SPSelect,, IP,, id, SP SP OP OPB, OP. OPB. SPB IP,, SP, OPB, 1., SP SPB GP, GP SPB. 2. GP 2. SP SPB, GP.,,.. ( ), ( ) ( ). GP MLRU(Modified Least Recently Used). MLRU.,.,,.,.. MLRU JiTUL...., JiTUL. URL OP OP, SP OP OP SP. SP OP, URL OP. V. OP SP, SP. h, (1-h)..,

8 1: - (Won-Ho Chung et al.: A Scheme of Efficient Contents Service and Sharing By Associating Media Server with Location-Aware Overlay Network)., (effective service time),,,,. (service efficiency), (1) (2). (service time ratio). ( ),. 100% ( ).,.., [ 5]., JiTUL., OP,,., (upload time ratio), (4).,, , 0.8, 05 FIg. 5. Service Efficiency() vs. Service Time Ratio() for h=0.9, 0.8, 0.5

9 (JBE Vol. 23, No. 1, January 2018) , 0.8, 0.5 Fig. 6. Service Efficiency() vs. Upload Time Ratio() for h=0.9, 0.8, birth-death M/M/1 [16].,.. 3, [ 6]. =0.8,..,., OP. OP. OP -,. VI.,,. -,.. 3-, 4-.. (References) [1] S. J. Koh, J. Y. Park, E. S. Kim and S. G. Kang, Overview of Multicasting for Internet Broadcasting, Electronics and Telecommunications Trends, Vol.17, No.3, pp.1-14, 2002 [2] W.-H. Chung, Design of Component Based Web-casting System for Real-Time Internet Broadcasting, J. of Korea Multimedia Society, Vol.12 No.1, pp.69-84, Jan [3] W.-H. Chung and Y.-M. Lim, Movie Contents Design of One-Person

1-12, 2011 [4] YouTube, http://www.youtube.com [5] PandoraTV, http://www.pandora.

10 정원호 외 1인: 미디어 서버와 위치-인지 오버레이 네트워크를 연계한 효율적 콘텐츠 공유 및 서비스 방법 (Won-Ho Chung et al.: A Scheme of Efficient Contents Service and Sharing By Associating Media Server with Location-Aware Overlay Network) Production Using IP Camera, J. of Korea Contents Association, Vol,11, No.2, pp.1-12, 2011 [4] YouTube, [5] PandoraTV, [6] Cisco, Fog Computing and the Internet of Things: Extend the Cloud to Where the Things Are, White Paper, Cisco Public, 2015 [7] S. W. Keum, T. B. Lim and J. I. Park, Fog Computing Architecture for IoT Service under Hybrid Broadcasting Environment, J. of Korean Institute of Broadcasting and Media Engineers, Vol.22, No.1, pp , 2017 [8] AfreecaTV, [9] B. Yang and H. Garcia-Molina, Designing a Super-Peer Network, Proc. of Int l Conf. on Data Engineering, Bangalore, India, 2003 [10] P. Eugster, R. Guerraoui, A.-M. Kermarrec and L. Massoulie, From Epidemics to Distributed Computing. IEEE Computer, Vol. 21, No. 4, pp , 2003 정원호 년 3월 1984년 8월 : KAIST 위촉 연구원 년 3월 2010년 2월 : 덕성여자대학교 컴퓨터공학부 교수 년 3월 1992년 7월 : IBM TJ Watson연구소 방문연구원 년 3월 현재 : 덕성여자대학교 디지털미디어학과 교수 : 주관심분야 : 분산 및 모바일 컴퓨팅 ORCID 이승연 - 5 [11] GP. Jesi, A. Montresor, O. Babaoglu, Proximity-aware Superpeer Overlay Topologies, Self-Managed Networks, Systems, and Services, Vol. 3996, LNCS, pp.43 57, 2006 [12] M. Liu, E. Harjula and M. Ylianttila, An Efficient Selection Algorithm for Building a Super-Peer Overlay, Journal of Internet Services and Applications, Vol. 4, No. 4, 2013, pp.4-16 [13] S. -H. Min, J. Holiday, and D. -S. Cho, Optimal Super-Peer Selection for Large-Scale P2P System, Proc. of 2006 Int l Conf. on Hybrid Information Technology (ICHIT 06), 2006 [14] T. E. Ng, and H. Zhang, Predicting Internet Network Distance with Coordinates-based Approach, Proc. of INFOCOM, 2002 [15] W. H. Chung, Proximity-based Efficient Super-Peer Selection for Clustering in Peer-to-Peer Systems, INFORMATION, Vol. 19, No. 11(B), Nov. pp , 2016 [16] L. Kleinrock, Queueing Systems Vol.1:Theory, John Wiley&Sons, NY, 1975 저자소개 - 3 현재 : 덕성여자대학교 디지털미디어공학과 학사과정 주관심분야 : 모바일 컴퓨팅

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DBPIA-NURIMEDIA 논문 10-35-03-03 한국통신학회논문지 '10-03 Vol. 35 No. 3 원활한 채널 변경을 지원하는 효율적인 IPTV 채널 관리 알고리즘 준회원 주 현 철*, 정회원 송 황 준* Effective IPTV Channel Control Algorithm Supporting Smooth Channel Zapping HyunChul Joo* Associate