地理信息移动服务中无线接入方式的比较与选择

本文从地理信息移动服务及其所关注的主要研究问题出发,对早期的移动GIS、LBS以及地理信息移动服务进行了比较与讨论,并从通讯角度对目前无线Internet接入的三种基本方式:WAP,i-mode,J2ME进行了比较后,就地理信息移动服务在这三种基本方式中的实现方式、优缺点进行了描述、比较与例证,从而体现出地理信息移动服务的发展与无线Internet接入方式选择之间的对应关系,得出未来地理信息移动服务中面向公众提供服务时,WAP是无线Internet接入方式的最佳选择,而J2ME是面向个人提供空间信息服务的最佳选择,两者之间的服务目标既有不同,又有交叉,未来的研究趋势将是如何通过新技术的应用,来充分挖掘地理信息移动服务领域内的潜力。

Comparisons and Selections of the Different Wireless Internet Access Modes for the Geographic Information Mobile Service

The evolution and the different study interests of Mobile GIS, Location Based Service and Geographic Information Mobile Service were introduced. Based on the comparison of the three main wireless internet access methods in mobile communication, WAP, i-mode and J2ME, the choices of wireless access implementation methods were proposed. WAP is the best way for future public Mobile Geographic Information Service and J2ME is more suitable for offering the personal assistant spatial-info service, like LBS for car-owners. The future research should be more focus on the key technologies about the new integration frameworks, cooperation and interoperation, nature language expression and more efficient geo-computation, in order to offering more powerful 4A public Mobile Geographic Information Service.