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1 21 VOD A study of the VOD contents decentralization delivery for unicast VOD

2

3 VOD VOD Video on Demand VOD, Management Server Management Server Management Server 4 VOD CDN i

4

5 Abstract A study of the VOD contents decentralization delivery for unicast VOD Takahiro Tsutsui Recently, the VOD(Video on Demand) service has spread. With VOD service, contents distribution is performed using a unicast in many cases. When the request concentrates on the contents server, crowding is generated on the core network. Then, when the access concentrates on the delivery server, it proposes the method to pass the copy of contents to other servers dynamically. In this proposal method, Management Server manages the request, contents information, and the contents copy delivery from the user. The number of connections to the content server is designated as a condition of congestion occurrence decision. When the number of connection exceeds a threshold value, it tells that the content server exceeded the threshold value to Management Server. Management Server transmits the contents copy instruction to the contents server at the copy destination. The crowding generation of the core network of the contents delivery in the unicast is controlled by this proposal method. The simulation, the content delivery by the unicast was done on the network where the proposal method was mounted and the network where contents were not distributed. The content delivery has been increased at random. As a result, the packet loss had been generated during four seconds in total in the network of the proposal method non-mounting. But, the packet loss had not been generated in the network where the iii

6 proposal method had been mounted. As a result, that dynamically reproducing contents to other server is able to control the crowding generation on the core network. key words unicast, VOD, Contents Decentralization, CDN iv

7 Video On Demand VOD VOD NVOD Contents Delivery Networks CDN CDN v

8 Management Server vi

9 31 33 vii

10

11 1.1 ( [1]) CDN ix

12

13 xi

14

15 [1] 1.1 FTTH(Fiber To The Home) CATV (Community Antenna TeleVision) [1] 1.2 1

16 1 2 ' 8*9:6 & % $ # "! 9>=@?,A,BDC F*G*H,I C 8*9,E <*E (*),+ -. /!0 "- #- $/ %1 &0 '. 324,576 ; ; ' ; 2 <76 & ; % ; $ ; # ; " ;! ; ; ; 1.1 ( [1]) Web 2

17 1.3 Video On Demand UDP(User Datagram Protocol) UDP RTP(Real-time Transport Protocol) PC TCP(Transmission Contorol Protocol) HTTP(Hyper Text Transfer Protocol) 1.3 Video On Demand VOD VOD VOD 3

18 VOD VOD VOD VOD VOD VOD NVOD NVOD Near Video On Demand VOD 1.4 VOD 4

19 1.4 5

20

21 2 Contents Delivery Networks 2.1 Contents Delivery Networks CDN [2] CDN CDN CDN CDN CDN 2.1 CDN 7

22 +* 1? 2 VCWCX Ẅ YCZ\[ P Q R Q6S T%U ,-. 89 : - /0 9 ;< & ' ( )' C = ACB A D EGF HGI! "#%$ J 4 K4 LCMON 2.1 CDN 8

23 2.1 Contents Delivery Networks CDN CDN VOD 9

24 2 CDN

25 CDN CDN 11

26

27 3 [3][4] Manegement Server Management Server ISP(Internet Service Provider) POP(Point Of Presence) Management Server Management Server Manager Sever 13

28 3 %$& (' %$& -F4D )+*-,"*/ /,43 5 0/ "!# $C D:";;<=E@? A"@? :4;;<=>@? AB@? Management Sever Management Server Management Server Management Server Management Sever Management Sever

29 IP xx.yy yy.zz xx.yy abc.avi abc.avi abc.avi Management Sever Management Sever Management Server

30 3 Management Server Management Server TCP FTP(File Transfer Protocol) 3.2 Management Server Management Server 3.2 abc.avi /13:23 5 lmn.avi /19:15 7 xyz.avi /09:

31 VOD 3.2 Web Management Server Management Server Management Server Management Server 17

32 U 3 # $&%'$)(&*,+-*,%/.01*,243,*,2/5 678:9<; "! MG_ 5 ecfag<f RJ*TS HJI h ij kl m n o f ]:p q sr tcv:u<vwo x"y KO V 6W7 XYZ = >?A@B C DAEGF RJ*TS HJI 6W[\^]G_a`" MN ;cbd K LMON ; P Q

33

34

35 4 NS-2[5] CDN Gbps 100Mbps JGN2plus[6] CBR FTP(File Transfer Protocol) byte 21

36 4 1Gbps 100Mbps!#" $ %'& ( )* +#, '! Mbps MPEG2-TS [7] 5sec 25sec sec byte 24Mbps 25sec 5sec

37 4.2 CDN VOD Gpbs Gbps Mbps Mbps Mbps 24Mbps 23

38 . + 9: /,- * >7 =2 <,;?!@BADC FEBG#H #"%$'&)( A B Mbps FTP 24

39 & 4.2, -/.1032 ) *+ -/.1032 '( $ -/.1032 $%!#" FTP 5 5 A B 980Mbps 1Gbps

40 2 1 7 ;< = >? 9: ACB*DFE#G0H*I ACB*DFEJH0I "!#%$'&(*),+.-0/

41 & 4.2 * ) '( $% +-,/.-0/ ,/.-02/3! #"

42

43 5 5.1 VOD VOD Management Server ns

44 VOD 30

45

46

47 [1] 21, [2] Scot Hull, CDN Web, BP [3] VOD 21 P167. [4] Takahiro TSUTSUI, Yoichi SHIMAKAMI, Kazunori SHIMAMURA, A contents decentralization delivery for unicast VOD, IWIT International Workshop on Information Technology(IWIT)2009 pp [5] The Network Simulator - ns-2, [6] JGN2, [7] HDV Format Web Site, [8] Dave Kosiur,, TCP/IP IP,

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