ESP Framework: A Middleware Architecture For Heterogeneous Sensing Systems [Report]

NESL Technical Report #: 2006-12-6


Abstract: Sensor systems are quickly becoming a flexible, inexpensive, and reliable platform to provide solutions for a wide variety of applications in real-world settings. For instance, sensor systems have been used for medical monitoring, detection and classification for defense purposes, and to perform environmental monitoring. The increase in the proliferation of sensor systems has paralleled the use of more heterogeneous systems in deployments. This paper presents a scalable, open middleware that enables interoperability between varied sensor systems and also details some of the fundamental services needed in such an environment. The ESP framework aims to provide a standard way to manage, query, and interact with sensor systems. We provide a method to describe sensor systems using ESPml, a XML schema, as the modeling language. The fundamental goal of the schema is to be able to describe sensor systems in a simple, compact manner while still having the ability to represent details such as the general setup, the type of data that can be provided, and the commands that are available. In addition, we present a web services based framework that enables system discovery using metadata information, interaction using system defined functional abstractions, and the ability to publish sensor data for future retrieval and aggregation purposes. By implementing several systems that scale in terms of complexity and capabilities, we show that the framework can accommodate various types of sensor systems. Also, performance tests of the framework show that the middleware is able to handle high demands on services.

Page (Count): 14

Date: 2006-12-28

Public Document?: Yes

NESL Document?: Yes

Document category: Report