%PDF-1.2 % 12 0 obj << /Length 13 0 R >> stream BT 82.44 745.2 TD 0 0 0 rg /F0 14.04 Tf 0.0119 Tc -0.0419 Tw (Generic adaptation mechanism for the support of context) Tj 343.92 0 TD 0.0047 Tc 0 Tw (-) Tj 4.68 0 TD 0.023 Tc -0.053 Tw (aware service ) Tj -209.4 -15.96 TD -0.0038 Tc -0.0262 Tw (provision in 3G networks) Tj 151.92 0 TD 0 Tc -0.03 Tw ( ) Tj -206.04 -18.84 TD /F1 12 Tf -0.0039 Tc 0.0039 Tw (Nikos Houssos, Spyros Pantazis, Athanassia Alonistioti) Tj 267.48 0 TD 0 Tc 0 Tw ( ) Tj -314.4 -17.4 TD /F1 9.96 Tf -0.0165 Tc 0.0465 Tw (Communication Networks Laboratory, Department of Informatics & Telecommunications, ) Tj 363.6 0 TD 0 Tc 0.03 Tw ( ) Tj -275.4 -11.4 TD -0.0281 Tc 0.0581 Tw (University of Athens, ) Tj 88.08 0 TD 0.0128 Tc 0.0172 Tw (157 84, Athens, Greece,) Tj 96.6 0 TD 0 Tc 0.03 Tw ( ) Tj -184.32 -11.52 TD -0.0139 Tc 0.0439 Tw ( email:{nhoussos, pantazis, nancy}@di.uoa.gr) Tj 184.08 0 TD 0 Tc 0.03 Tw ( ) Tj -92.04 -18.12 TD /F1 12 Tf 0 Tw ( ) Tj -258.6 -10.56 TD /F2 9 Tf 0.0124 Tc 0.0176 Tw (Abstract ) Tj 35.04 0 TD 0.003 Tc 0 Tw (-) Tj 3 0 TD 0 Tc 0.03 Tw ( ) Tj 4.44 0 TD /F0 9 Tf -0.0466 Tc 2.2366 Tw (The forthcoming era of ) Tj 2.22 Tc 0 Tw (3) Tj 103.92 3.96 TD /F0 6 Tf -0.12 Tc (rd) Tj 5.88 -3.96 TD /F0 9 Tf -0.0366 Tc 2.2266 Tw ( generation \(3G\) mobile) Tj 0 Tc -0.09 Tw ( ) Tj -152.28 -10.56 TD -0.0417 Tc 9.6517 Tw (communications is heralded to change the wireless) Tj 0 Tc 0.03 Tw ( ) Tj 0 -10.44 TD -0.0376 Tc 2.9776 Tw (telecommunication experience dramatically. User expectations) Tj 0 Tc 0.03 Tw ( ) Tj 0 -10.32 TD -0.0262 Tc 0.4162 Tw (are raised to) Tj 48.36 0 TD -0.0281 Tc 0.2981 Tw ( a significantly higher level, towards the demand for ) Tj -48.36 -10.32 TD -0.0742 Tc 0 Tw (terminal) Tj 32.52 0 TD 0.003 Tc (-) Tj 3 0 TD -0.0056 Tc 1.1156 Tw (, network) Tj 37.44 0 TD 0.003 Tc 0 Tw (-) Tj 3 0 TD -0.0445 Tc 1.1545 Tw ( and location) Tj 51.24 0 TD 0.003 Tc 0 Tw (-) Tj 3 0 TD -0.0307 Tc 1.0207 Tw (aware provision of ubiquitous,) Tj 0 Tc 0.03 Tw ( ) Tj -130.2 -10.32 TD -0.0425 Tc 2.9125 Tw (personalized multimedia services. Under this perspective, the) Tj 0 Tc -0.09 Tw ( ) Tj 0 -10.44 TD -0.0323 Tc 1.3557 Tw (need for adaptability of services and systems to largely diverse) Tj 0 Tc -0.09 Tw ( ) Tj 0 -10.32 TD -0.0054 Tc 2.9154 Tw (contexts is) Tj 42.6 0 TD -0.0224 Tc 2.8364 Tw ( clearly identified. Generic, dynamically extensible) Tj 0 Tc -0.09 Tw ( ) Tj -42.6 -10.32 TD -0.0548 Tc 1.1498 Tw (adaptation mechanisms that are independent of the subject and) Tj 0 Tc -0.09 Tw ( ) Tj 0 -10.32 TD -0.0283 Tc 2.8717 Tw (criteria of adaptation can be a significant step towards this) Tj 0 Tc 0.03 Tw ( ) Tj 0 -10.44 TD -0.0401 Tc 3.1601 Tw (direction. In the present paper) Tj 128.64 3.96 TD /F0 6 Tf 0 Tc 0 Tw (1) Tj 3 -3.96 TD /F0 9 Tf -0.0518 Tc 3.0818 Tw (, we introduce a mechanism) Tj 0 Tc -0.33 Tw ( ) Tj -131.64 -10.32 TD -0.0217 Tc 2.3317 Tw (aiming to fulfill th) Tj 76.2 0 TD -0.0499 Tc 2.2399 Tw (ese requirements. The proposed adaptation) Tj 0 Tc -0.09 Tw ( ) Tj -76.2 -10.32 TD -0.0487 Tc 6.0387 Tw (system has been designed, implemented and successfully) Tj 0 Tc 0.03 Tw ( ) Tj 0 -10.32 TD -0.0338 Tc 2.9887 Tw (integrated and tested in a distributed software platform for) Tj 0 Tc -0.09 Tw ( ) Tj 0 -10.44 TD -0.0416 Tc 0.0716 Tw (provision of value added services to 3G mobile users.) Tj 201.12 0 TD 0 Tc 0.03 Tw ( ) Tj -201.12 -16.08 TD /F2 9 Tf 0 Tc 0 Tw (Keywords:) Tj 39 0 TD /F1 9.96 Tf 0 Tc 0.03 Tw ( ) Tj 6.24 0 TD /F1 9 Tf -0.0042 Tc 3.7542 Tw (adaptability, context) Tj 77.28 0 TD 0.003 Tc 0 Tw (-) Tj 3 0 TD -0.0231 Tc 3.7731 Tw (awareness, ) Tj 3.78 Tc 0 Tw (3) Tj 49.56 0 TD -0.0212 Tc 3.7112 Tw (G mobile services,) Tj 0 Tc 0.03 Tw ( ) Tj -175.08 -10.32 TD -0.0075 Tc 7.9575 Tw (service management platforms, reconfigurability, ubiquitous) Tj 0 Tc 0.03 Tw ( ) Tj 0 -10.32 TD -0.0072 Tc 0 Tw (computing.) Tj 40.8 0 TD /F1 9.96 Tf 0 Tc 0.03 Tw ( ) Tj 55.08 -10.32 TD /F1 8.04 Tf 0.045 Tc 0 Tw (1.) Tj 6 0 TD 0 Tc 0.03 Tw ( ) Tj 5.28 0 TD -0.0373 Tc 0 Tw (I) Tj 2.4 0 TD /F1 6.48 Tf -0.0102 Tc (NTRODUCTION) Tj 46.68 0 TD /F1 8.04 Tf 0 Tc 0.03 Tw ( ) Tj -156.24 -10.92 TD /F1 9.96 Tf -0.0178 Tc 5.0728 Tw (The evolution of mobile networks and systems to ) Tj 4.98 Tc 0 Tw (3) Tj 243.96 4.56 TD /F1 6.48 Tf 0.0011 Tc (rd) Tj 5.4 -4.56 TD /F1 9.96 Tf 0 Tc 0.03 Tw ( ) Tj -249.36 -11.52 TD -0 Tc 1.0204 Tw (generation and beyond is expected to bring about substantial) Tj 0 Tc 0.03 Tw ( ) Tj 0 -11.4 TD -0.0096 Tc 2.1996 Tw (changes to telecommunication service pro) Tj 176.04 0 TD -0.0077 Tc 2.0777 Tw (vision. According) Tj 0 Tc -0.09 Tw ( ) Tj -176.04 -11.52 TD 0.0008 Tc 0.3292 Tw (to existing paradigms of 2) Tj 105.12 0 TD 0.0433 Tc 0 Tw (-) Tj 3.24 0 TD 0.0108 Tc 0.2592 Tw (2.5G, end) Tj 39.48 0 TD 0.0433 Tc 0 Tw (-) Tj 3.24 0 TD -0.0071 Tc 0.2291 Tw (users are offered a small ) Tj -151.08 -11.52 TD -0.0131 Tc 2.6381 Tw (number of vertically integrated services that are tightly to) Tj 0 Tc 0.03 Tw ( ) Tj 0 -11.52 TD -0.0077 Tc 2.3348 Tw (specific standards and technologies. In the envisioned new) Tj 0 Tc -0.21 Tw ( ) Tj T* -0.0154 Tc 5.274 Tw (era, however, where customer expectations as well as) Tj 0 Tc -0.09 Tw ( ) Tj T* -0.0344 Tc 0 Tw (in) Tj 7.68 0 TD -0.0134 Tc 2.5034 Tw (vestments and revenue requirements are raised to a new) Tj 0 Tc -0.21 Tw ( ) Tj -7.68 -11.4 TD -0.0052 Tc 8.0752 Tw (level, a plethora of functionality) Tj 160.08 0 TD 0.0433 Tc 0 Tw (-) Tj 3.24 0 TD 0.0083 Tc 8.0617 Tw (rich, profit) Tj 50.76 0 TD 0.0433 Tc 0 Tw (-) Tj 3.24 0 TD -0.0051 Tc -0.0849 Tw (creating ) Tj -217.32 -11.52 TD -0.0149 Tc 0.7249 Tw (applications, typically contributed by many different business) Tj 0 Tc -0.09 Tw ( ) Tj 0 -11.52 TD -0.0016 Tc 1.7916 Tw (players, should be available to mobile users) Tj 0 Tc -0.09 Tw ( ) Tj 188.88 0 TD 0.0489 Tc 0 Tw ([1]) Tj 11.76 0 TD 0.0394 Tc 1.6706 Tw (. Moreo) Tj 33.48 0 TD 0.0078 Tc 0.0222 Tw (ver, ) Tj -234.12 -11.52 TD -0.0025 Tc 1.2475 Tw (services should be accessible in an unprecedented variety of) Tj 0 Tc -0.09 Tw ( ) Tj 0 -11.52 TD -0.0096 Tc -0.0804 Tw (contexts ) Tj 38.4 0 TD 0.0489 Tc 0 Tw ([2]) Tj 11.76 0 TD 0.0103 Tc 2.7497 Tw (, which could not be predicted or catered for) Tj 0 Tc 0.03 Tw ( ) Tj -50.16 -11.52 TD -0.0099 Tc 2.8799 Tw (during service design and development. These extensively) Tj 0 Tc -0.21 Tw ( ) Tj 0 -11.4 TD -0.0164 Tc 6.2624 Tw (demanding requirements clearly indicate the ne) Tj 219.6 0 TD 0.0209 Tc 6.1291 Tw (ed for) Tj 0 Tc 0.03 Tw ( ) Tj -219.6 -11.52 TD -0.002 Tc 1.517 Tw (adaptability of applications as well as service provision and) Tj 0 Tc 0.03 Tw ( ) Tj 0 -11.52 TD -0.0108 Tc 8.4888 Tw (delivery procedures to highly diverse environments.) Tj 0 Tc 0.03 Tw ( ) Tj T* -0.0183 Tc 5.7683 Tw (Adaptability, an inherently challenging task, is further) Tj 0 Tc 0.03 Tw ( ) Tj T* -0.0113 Tc 0.308 Tw (complicated by the fact that adaptation mechanisms should be ) Tj T* 0.0149 Tc 6.7351 Tw (generic, portable) Tj 73.92 0 TD 0.0028 Tc 6.7272 Tw ( and interoperable so that they are) Tj 0 Tc 0.03 Tw ( ) Tj -73.92 -11.4 TD -0.0045 Tc 2.5545 Tw (themselves able to be applied to a diversity of entities in) Tj 0 Tc -0.09 Tw ( ) Tj 0 -11.52 TD -0.0073 Tc 0.8023 Tw (different circumstances. In this paper, we introduce a generic) Tj 0 Tc 0.03 Tw ( ) Tj T* -0.0106 Tc 1.9606 Tw (adaptation mechanism, which has been designed to address) Tj 0 Tc -0.09 Tw ( ) Tj T* -0.0139 Tc 6.9739 Tw (the aforementioned requirements, and we) Tj 0 Tc 0.03 Tw ( ) Tj 201.84 0 TD -0.0017 Tc 6.8717 Tw (present its) Tj 0 Tc -0.09 Tw ( ) Tj -201.84 -11.52 TD -0.0031 Tc 0.1891 Tw (successful application in the context of a 3G service provision ) Tj 0 -11.4 TD -0.008 Tc 0.038 Tw (platform. ) Tj 39.24 0 TD 0 Tc 0.03 Tw ( ) Tj -39.24 -11.52 TD -0.0148 Tc 0.3448 Tw (The rest of this document is organized as follows: At first, we ) Tj 0 -11.52 TD -0.0024 Tc 4.7924 Tw (present the environment where the proposed adaptation) Tj 0 Tc -0.09 Tw ( ) Tj T* -0.0237 Tc 2.608 Tw (mechanism was integrated and applied, namely a soft) Tj 230.16 0 TD -0.0381 Tc 0.0681 Tw (ware ) Tj -230.16 -14.04 TD 0 Tc 0.03 Tw ( ) Tj 75.6 0 TD ( ) Tj ET 42.6 104.28 144 0.48 re f BT 186.6 102.24 TD ( ) Tj -144 -6.24 TD /F1 5.04 Tf 0 Tw (1) Tj 2.52 -3.48 TD /F1 8.04 Tf -0.0073 Tc 0.2323 Tw ( Part of the work presented in this paper has been performed in the frame of ) Tj -2.52 -9.24 TD -0.0307 Tc 0.7807 Tw (project IST) Tj 36.72 0 TD -0.0373 Tc 0 Tw (-) Tj 2.64 0 TD 0.06 Tc (10206) Tj 20.4 0 TD -0.0373 Tc (-) Tj 2.64 0 TD -0.0675 Tc 0.8175 Tw (MOBIVAS ) Tj 0.8027 Tc 0 Tw (\() Tj 42 0 TD 0 0 1 rg 0.0165 Tc (http://mobivas.) Tj 48.72 0 TD 0.011 Tc (cnl.di.uoa.gr) Tj ET 147 82.08 89.28 0.36 re f BT 236.28 83.28 TD 0 0 0 rg -0.0112 Tc 0.7612 Tw (\). The content of) Tj 0 Tc -0.09 Tw ( ) Tj -193.68 -9.12 TD -0.0095 Tc 0.0395 Tw (this paper expresses solely the opinions of the authors.) Tj 175.08 0 TD 0 Tc 0.03 Tw ( ) Tj 85.68 566.4 TD /F1 9.96 Tf -0.0052 Tc 1.1602 Tw (platform for provision of services over 3G mobile networks.) Tj 0 Tc 0.03 Tw ( ) Tj 0 -11.52 TD -0.0042 Tc 0.1422 Tw (We then discuss generic adaptation \(with a particular focus on ) Tj T* -0.0131 Tc 5.1631 Tw (mobile service provision\) and identify the fundamental) Tj 0 Tc 0.03 Tw ( ) Tj T* -0.0167 Tc 1.8317 Tw (requirements of a flexible adaptation mechanism as well as) Tj 0 Tc -0.09 Tw ( ) Tj 0 -11.4 TD 0.0009 Tc 1.5891 Tw (the critical ) Tj 1.5778 Tc 0 Tw (c) Tj 52.44 0 TD -0.0171 Tc 1.5071 Tw (hoices involved in its design. 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