| Every user of telecommunications wants mobile equipments such asexpensive personal digital assistant (PDA) and lower-costly popular mobilephones with more functions. Now many people are studying the possibilityof adding new functions to lower-costly mobile phones by ASIC technology.If adding these new functions needs integrating operating system, theproblem will be very difficult considering the related factors such as thecosts of the software and hardware volume. Generally speaking, popularmobile equipments only provide special solutions supporting specialservices and interfaces, though most of which share in a lower platform, butthe special layer over ASIC interferes the development and the promotion ofapplications.QUALCOMM's BREW(Binary Runtime Environment for Wireless)isone of the most popular wireless platforms supporting applet running on.BREW is an end-to-end solution, and it is not only an open technologyplatform but also a well-developed business model that is BREWDistribution System for revenue sharing along the entire value chain.The developing of wireless applications based on BREW platform isinvolved in several key problems. (1) The mobile equipments'resources,especially the RAM, are rarther limited, so the thesis studied themanagement of RAM and its improvement based on BREW to crack thisproblerm. In addition, the thesis described both the general principles themanagement of RAM and took an true applet as an example to describe theimproving solution; (2) The computing speed of current ARM chips is fairlylimited, and thus for those applets concerned with dealing many images,especially for action games with many actors and many scenes, makingevery actors vivid in these games is quite difficult by the conventionalsolution of dealing these kind of problems of personal computer, which isanother problem hoping to be solved urgently; (3) Now online applets, forinstance, networking games, are not the patent of PC, and BREW has madeplaying networking games on mobile phones realized, but how to do it?There is no doubt that this is another problemconfronting us; (4) ThoughBREW SDK has been upgraded constantly, but it can't satisfy the special... |
