DEWS2004 I-10-04 606 8501 E-mail: {akahoshi,hirotanaka,tanaka}@dl.kuis.kyoto-u.ac.jp A Basic Study on Ubiquitous Hypermedia Model Yuhei AKAHOSHI, Hiroya TANAKA, and Katsumi TANAKA Graduate School of Informatics, Kyoto University YoshidaHonmachi, Sakyo-ku, Kyoto-Shi E-mail: {akahoshi,hirotanaka,tanaka}@dl.kuis.kyoto-u.ac.jp Abstract Based on present hypermedia models which organize digital contents and connect using hyperlink, concepts including physical objects and contents in real world in addition to digital contents, called Ubiquitous Hypermedia are being proposed. In this paper, we study about a hypermedia model suitable for ubiquitous environment. In our model, contents, devices, and users are basic elements. These are explicitly devided into separate layers in the hierarchical structure. Concepts that are present in real world are also adopted in our model such as time, space, redundancy, and these are delivered to presentation devices which exist ubiquitously in suitable way and effective style. Our model tries to provide users a suitable method to browse contents with various devices in ubiquitous environments. Key words Ubiquitous Hypermedia 1. LAN RFID Web Web ID
2. 3. 4. 5. 6. 7. 2. [1] HyperReal [2] Dexter Hypertext Reference Model [5] Physical Hypermedia [3] ID Takashio [4] PC 3. 3. 1 3 3. 2 2 1
Web 4. Web URL PC PDA Web 1 2 3 4 (1) CGIJSPASP (2)(3) 1 Web Web (4) Web 1 1 5. 3. 4. 1 5 Content Device User DistributionNavigation a) b) ID ID 3 c) 1
a1 1 A2 a b d d3 f2 2 4 3 B3 B A c e f f5 C5 Content Distribution 5 Device Navigation User C 1 Distribution Navigation RFID 6. 3 2 2 5 5 6. 1 Content Content HTML Content Content (cid, cc) cid IDcC cres Web cres Distribution 6. 2 Device Device PDAPC 1 1 Device Device (did, dpos, dtime, dc) did IDdpos dtime dc Device dres 1 2 1 dres Distribution 6. 3 User User User (uid, upos, utime) uid IDupos utime User ures ures Navigation 6. 4 Distribution Distribution Content Device Distribution
Navigation ID Distribution Distribution 3. 6. 5 Navigation Navigation Device Distibution 7. 2 (dpos,dtime,dc) 7. 1 1 2 2 Navigation Navigation 2
cc 1 cc i cc i Distribution dc 1 = f 1 (Copy(cC i ),dtime 1,dpos 1,Res 1 ) dc 2 = f 2 (Copy(cC i ),dtime 2,dpos 2,Res 2 ) 3 Copy(cC i ) Copy(cC i ) cc i D 1 D 2 cc n Content Device 7. 2 3. Content Device Distibution C i cc i D i dtime i dpos i dc i dc i = f i(copy(cc i),dtime i,dpos i,res i) Copy(C) C Res i D i 3D i cc i = g i(copy(dc i),cres i) cres i C i 8. ID 15 (A)(2) 14208036 21 COE [1], Vol.42, No.SIG15 (TOD12), pp.40 49, 2001 12 [2] L.Romero, N.Correia, HyperReal: A Hypermedia Model for Mixed Reality, Proc. of The 14th Conf. on Hypertext and Hypermedia (ACM HyperText 03), pp.2 9, Nottingham, U.K., Aug., 2003 [3] K. Gronbak, J.F. Kristensen, P. Orbak, M.A. Eriksen, Physical Hypermedia: Organising Collections of Mixed Physical and Digital Material, Proc. of The 14th onf. on Hypertext and Hypermedia (ACM HyperText 03), pp.10 19, Nottingham, U.K., Aug., 2003 [4] K. Takashio, G. Soeda, H.Tokuda, A Mobile Agent Framework for Follow-Me Applications in Ubiquitous Computing Environment, Proc. of 21st Int l Conf. on Distributed Computing Systems Workshop (ICDCSW 01), pp.202 207, Meza, Arizona, Apr., 2001 [5] F. Halasz, M.Schwartz, The Dexter Hyptertext Reference Model, Communicatinos of the ACM, Vol.37, Issue 2, pp.30 39, Feb., 1994