Support and Optimization of Java RMI over Wireless Environments

Distributed object-oriented platforms are increasingly important over wireless environments to provide frameworks for collaborative computations and for managing a large pool of distributed resources. Due to limited bandwidths and heterogeneous architectures of wireless devices, efforts are needed to support object-oriented frameworks over heterogeneous wireless environments and optimize system performances. In our research work, we are working towards efficiently supporting object-oriented environments over heterogeneous wireless environments. In this paper, we report early experimental platforms to support Java RMI over Bluetooth, GPRS, and WLAN environments. The Bluetooth layer is done by by incorporating a set of protocol stack layers for Bluetooth, known as JavaBT developed by us and by supporting L2CAP layer with sockets to support RMI socket. In addition, our support for RMI over GPRS/WLAN is done by supporting RMI over mobile IPv4. The roaming among heterogeneous wireless environments are supported by Java proxy mechanisms and exception handlings. Experimental results with the prototypes of Java RMI support over hetreogeneous wireless environments are given. This platform can serve as a research platform for distributed object-oriented envionments over wireless environments.