隨著無線網路基礎建設的發展以及網際網路無線上網之趨勢，情境感知應用成為各國資訊發展重要趨勢，傳統GPS系統侷限於各類交通工具未具有網路功能的導航應用中，無法將交通工具即時位置資訊整合至網路服務。

本研究提出以GPS為基礎的情境感知閘道系統運作模式，結合GPS定位技術、SOAP 訊息技術、IPv6網路技術，發展出將GPS定位訊息以SOAP和IPv6封包來傳送的運作模式，進而發展出GPS訊息閘道系統與情境感知應用管理者等模組，為了驗證情境感知閘道系統運作模式，本研究實作出三種情境感知應用包括 「高速公路」、「學校」以及「都市」三種情境應用。

結果顯示GPS定位訊息能有效的交互切換三種情境感知應用，此成果可以提供做為情感知中介軟體技術的重要參考。

With the deployment of wireless network infrastructure, context-aware application becomes one weighty trend of the information technology development around the world. Traditional Global Positioning System (GPS) usually used with Geographic Information Systems (GIS) navigation system in different kind of vehicles do not support network capability for the access of real-time location based information.

In this paper, we present GPS-based context-aware gateway system operation model. It is a new communication model integrated with the technologies such as GPS technology, SOAP message technology, and IPv6 internet protocol. In our communication model, GPS signals are packed into SOAP messages and transmitted by IPv6 packets. Using this communication model, we develop the GPS-message gateway and context-aware application manager. In order to validate our communication model, we introduce three kinds of context-aware application model named “Freeway Model”, “Campus Model”, and “City Model” to be integrated in our communication model.

The result presents that our system can effectively switch GPS signals among above-mentioned applications models, which opens out a wide prospect of context-aware middleware evolution.

[1]Bill N. Schilit, Norman Adams, and Roy Want, “Context-Aware Computing Applications”, IEEE Workshop on Mobile Computing Systems and Applications, December 8-9 1994.

[2]楊志彬, “IPv6中介軟體之研究”, 臺灣師範大學碩士論文 2005年7月

[3]資策會, “2005年我國家庭之寬頻、行動與無線應用現況與需求調查”,資策會ACI-FIND, http://www.find.org.tw

[4]Curbera, F., Duftler, M., Khalaf, R., Nagy, W., Mukhi, N. and Weerawrana, S., “Unraveling the Web Service Web: An Introduction to SOAP, WSDL, and UDDI,” IEEE Internet Computing, Vol. 6, No. 2, pp. 86-93, 2002.

[5]Web Service Glossary, http://www.w3.org/TR/2003/WD-ws-gloss-20030514/#service.

[6]T. Berners-Lee, MIT/LCS, R. Fielding, U.C. Irvine, L. Masinter and Xerox Corporation, "Uniform Resource Identifiers (URI): Generic Syntax," RFC 2396, August 1998.

[7]Doug Tidwell, “Introduction to XML”, July 1999, IBM developer works, July 1999, updated September 2002

[8]W3C XML Working Groups, “XML(Extensible Markup Language)”, http://www.w3.org/XML/

[9]Barillot, E. and Achard, F., “XML: a lingua franca for sciences?” Trends in Biotechnology, Vol. 18, pp. 331-333, 2000.

[10]段智華, “淺談 SOAP”, IBM developer works, 2001年8月1日

[11]Martin Gudgin, Marc Hadley, Noah Mendelsohn, Jean-Jacques Moreau, Canon, Henrik Frystyk Nielsen, “SOAP V1.2 W3C Recommendation” , June 2003 http://www.w3.org/TR/SOAP/

[12]Don Box, David Ehnebuske, Gopal Kakivaya, Andrew Layman, Noah Mendelsohn, Lotus, Henrik Frystyk Nielsen, Satish Thatte, Dave Winer. “Simple Object Access Protocol (SOAP) 1.1”, W3C,8 May 2000

[13]Erik Christensen, Francisco Curbera, Greg Meredith, Sanjiva Weerawarana, "Web Services Description Language (WSDL) 1.1", W3C Note 15 March 2001. http://www.w3.org/TR/wsdl

[14]OASIS, UDDI Version 2.04 API Specification. UDDI Committee Specification, 19 July 2002

[15]微軟嵌入式系統發展中心, “嵌入式系統發展趨勢”, http://msdn.microsoft.com/embedded/default.aspx

[16]趙文鵬, “嵌入式Linux開發系列之一: 走進嵌入式Linux的世界”, IBM developer works, 2003年9 月1日

[17]台灣ebXML推廣中心, “漫談ebXML”, 2006年1月, http://www.ebxml.org.tw/big5/index.jsp

[18]台灣ebXML推廣中心, “ebXML架構, 2006年1月”, http://www.ebxml.org.tw/big5/content/ebxml_introduce.htm

[19]OASIS, “ebXML Registry Reference Implementation Project (ebxmlrr)”. January, 2006, http://ebxmlrr.sourceforge.net/

[20]ED Kaplan, JL Leva, “Understanding GPS: principles and applications,” 1996, Boston: Artech Hous

[21]GARMIN, “GPS35LP Series Technical Specification,” http://www.garmin.com.tw/

[22]Wes Biggs, Harry Evans, “Simplify XML programming with JDOM, IBM developer works”, 1 May 2001

[23]JDOM Project, http://www.jdom.org/

[24]WebServices - Axis, http://ws.apache.org/axis/

[25]Tony Graham, “Introducing OMAR”, Sun Microsystems, http://www.idealliance.org/proceedings/xtech05/papers/03-03-02/

[26]Dey, A.K. and Abowd, G.D. “Toward a better understanding of context and context-awareness.” GVU Technical Report GIT-GVU-99-22, College of Computing, Georgia Institute of Technology, 1999, ftp://ftp.cc.gatech.edu/pub/gvu/tr/1999/99-22.pdf

[27]Wenzhe Zhang, Haibing Guan, Minglu Li, Min-You Wu,Chongqing Zhang, Feilong Tang, “Context-Aware Adaptation for Media Delivery in Pervasive Computing Environment”, GPC 2006, LNCS 3947, pp. 634 – 643, 2006.

[28]Mari Korkea-aho, “Context-Aware Applications Survey”, 2000, http://users.tkk.fi/~mkorkeaa/doc/context-aware.html