Herman Chung-Hwa Rao

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—General Packet Radio Service (GPRS) provides packet switched data service for mobile users. However, the existing GPRS specification does not provide the push mechanism and it is difficult to support GPRS services such as call termination (incoming call) for wireless voice over IP (VoIP). Based on short message service , this paper proposes a push(More)
iMobile is a proxy-based platform that addresses the researchissues in building mobile services. iMobile acts as a massagegateway that allows mobile devices using various protocols ondifferent access networks to relay messages to each other. It alsoallows these clients to access internet services, corporatedatabases, and to control various networked(More)
During the past few years, the mobile prepaid service has been growing exponentially all over the world. Four approaches have been proposed to provide mobile prepaid service. We describe these approaches and compare their strength and weakness. Our analysis indicates that the handset based approach is a low cost, high risk solution. The wireless intelligent(More)
The Web contains so much information that it is almost beyond measure. How do users manage the useful information that they have seen while screening out the rest that doesn't interest them? Bookmarks help, but bookmarking a page doesn't guarantee that it will be available forever. Search engines are becoming more powerful, but they can't be customized(More)
iMobile is a platform that addresses the research issues in building mobile services. iMobile acts as a message gateway that allows mobile devices using various protocols on different access networks to relay messages to each other. It also allows these thin clients to access resources and information on the internet and various networks. iMobile implements(More)