Mobility

SMILE-JS, a SIP-Based Middleware for J2ME Devices

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Executive Summary

In this paper, the authors report their two years experience in designing and implementing a new middleware solution for distributed mobile applications exploiting the Session Initiation Protocol (SIP) and the JavaScript Object Notation (JSON). The proposed solution has been designed to port the Simple Middleware Independent LayEr (SMILE) framework to mobile devices running the limited version of Java 2 Micro Edition (J2ME CLDC). It provides J2ME developers with the very same abstraction layer offered by the SMILE API under the J2SE environment, allowing seamless interoperability between SMILE peers running on desktop computers/servers and peers running on mobile devices. The solution will be denoted as SMILE-JS, where JS stands for JSON over SIP.

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