Minhong Yun

Design and Implementation of Smartphone Edition based on Embedded Linux

The paper describes the design and implementation of Qplus Smartphone Edition based on embedded Linux. Existing Smartphone platforms entailed royalty expenses and had customization difficulties due to the closure of their source codes. The Qplus Smartphone Edition requires no royalty because it is based on the embedded Linux. And, it supports key navigation functionality such as moving between folders or running applications with key-only operations. It also provides more user friendly environment through screen interfaces and indicators similar to those of the cellular phones.

Design and Implementation of Embedded Linux-based Mobile Teller which supports CDMA and WiBro networks

This paper describes the implementations of the first application service based on embedded Linux; Mobile Teller which uses WiBro network for data communications and CDMA network for voice communications. Currently, with the appearance of WiBro service, dual-mode terminals which support two heterogeneous networks are available. But, the development of applications which effectively use these networks for providing better service to user is rarely prepared. At Mobile Teller, when a sender on a dual-mode terminal types texts, the texts are transmitted to a TTS server located in the Internet through WiBro network. Subsequently, the TTS server converts the texts into voices and transmits the voice data to the dual-mode terminal. At last the dual-mode terminal sends the voice to the receiver through the CDMA network. In case of noisy environment or when a user has difficulty in speaking, Mobile Teller makes voice communication possible

The Design and Implementation of Dual-mode Voice Storage Service which supports CDMA and WiBro network

This paper describes the design and implementations of the application service based on embedded Linux; personal voice recorder (PVR) which uses WiBro network for data communications and CDMA network for voice communications. PVR consists of client and server. PVR client send CDMA voice data to PVR server located in the Internet through WiBro network. Then, PVR server converts voice data to wave form and stores it. In case of shortage of storage space on terminal, PVR makes user to store voice data.

Design and Implementation of Linux-based Application which supports CDMA and WiBro network

This paper describes the design and implementations of the first application service based on embedded Linux; Mobile Teller which uses WiBro network for data communications and CDMA network for voice communications. When a sender on a dual-mode terminal types texts, the texts are transmitted to a TTS server located in the Internet through WiBro network. Subsequently, the TTS server changes the texts into voices and transmits the voice data to the dual-mode terminal. At last the dual-mode terminal sends the voice to the receiver through the CDMA network. In case of noisy environment, Mobile Teller makes user to voice communication