The conventional Web Service communication framework does not adequately meet the needs of mobile computing. It is physically constrained and requires an optimized messaging scheme to prevent performance degradations in not only mobile computing, but also conventional computing that is interacting with mobile applications. With our novel architecture called the Handheld Flexible Representation (or HHFR), mobile applications can negotiate characteristics for message stream and representation, and exchange messages in an optimized streaming fashion. By distinguishing between message semantics and syntax, the architecture provides an overall system framework for Web Services applications in mobile computing environment. Despite its important role in distributed computing, mobile computing hasn't reached its full potential because of the limited availability of high speed wireless connections, such as third generation cellular technology (3G) or Broadband Wireless access. In this dissertation, we show that the messaging scheme of our new architecture significantly speeds up the messaging performance in comparison to a conventional SOAP-based Web Service messaging scheme when the request and response messages are in the same syntax, i.e. the same service is used continuously.
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