An Application Level Gateway for Interactive Remote Instruction

IRI-h (for Interactive Remote Instruction- heterogeneous) is a Java-based cross-platform distributed education instruction system for heterogeneous network environments. In this paper, we introduce the design and operation of an application level gateway that is seam- lessly integrated within IRI-h's architecture to handle class participants with no multicast connectivity or limited bandwidth such as home users. A gateway prototype is fully implemented in Java and tested within an experi- mental lab setup. Preliminary performance results indicate the effectiveness and feasibility of our design.