Providing an embedded software environment for wireless PDAs

Abstract

The use of wireless Pdas is foreseen to outrun the one of Pcs in the near future. However, for this to actually happen, adequate software environments must be devised in order to allow the execution of various types of applications. This paper introduces the base features of such a n e n vironment, which is a customizable Jvm-based middleware. In particular, the middleware platform embeds services for appropriate resource management and for supporting novel Pda-oriented applications.

Hardware support for detecting illegal references in a multiapplication real-time Java environment

“…In particular, memory management must be carefully designed to be compliant with real-time constraints. In [Issarny et al 2000], we present a study of the requirements for embedded software environment aimed at wireless PDAs. These requirements have been addressed through a middleware platform where, unlike traditional JVMs, several applications run concurrently within a single JVM instance.…”

“…In the proposed solution, there is a memory space accessible by all applications in the system, which allows interprocess communication by using both the communication model of standard Java (based on shared variables and monitors), and the specific classes of RTSJ that provide communication among real-time tasks and threads. We have a distinct GC per application, but different from the scheme presented in [Issarny et al 2000]. Shared objects among applications are not collected, which simplifies the resource management.…”