Study And Design Of Message Oriented Middleware For Mobile Computing

Recent advances in wireless networking technologies and the growing success of mobile computing devices, such as laptop computers, smart phones, personal digital assistants, watches and the like, are enabling new classes of applications that present challenging problems to designers. Mobile devices face temporary loss network connectivity when move; they are likely to have scarce resources, such as low battery power, slow CPU speed and little memory; they are required to react to frequent and unannounced changes in the environment, such as high variability of network bandwidth, and in the resources availability. To support designers building mobile applications, research in the field of middleware system has proliferated. Middleware aims at facilitating communication and coordination of distributed components, concealing complexity raised by mobility from application engineers as much as possible. In this paper, we examine characteristics of mobile distributed systems designed and distinguish them from their fixed counterpart. We introduce a framework to support mobility, and we present a detailed comparative review of major results reached in this field.Message oriented middleware (MOM) is a specific class middleware that operates on the principles of message passing or message queuing. Existing MOM system doesn't support the function for mobile computing environment. In the near future, requirements of mobile computing will increase and more dynamic services for mobile computing will be required. And integrating with wireless networks is becoming almost commonplace.This paper presents the study, design, and implementation of MobileMOM, a message oriented middleware system for mobile computing. It provides a solution for mobile application specific problems such as resource constraints, networkcharacteristics, and data optimization. MobileMOM consists of three main functions:1-MobileMOM Client, a lightweight client of Message Oriented Middleware(MOM) based on XMLBlaster;2-MobileUMS, for reliable and efficient transmission between mobile devices and a server with pluggable components; 3-MobileMOM Server, a MOM server based on XMLBlaster Server.