Abstract: Sensor middleware provides a programming abstract which facilitates the programmer task and bridges the gap between applications and the lowlevel hardware. Current middlewares are mostly based distributed. Middleware for distributed systems is a relatively mature research area with a considerable amount of work done on the aforementioned topics. This paper discusses why standard distributed systems middleware solutions are not suitable to address Wireless Sensor Network(WSN) problems. Then the paper discusses and summarizes some of the notable middleware approaches each representing a different technique. Finally it illustrates by a health monitoring use case, proposes an enhanced middleware framework that better addresses the needs of WSN applications.

Key words: WSNs, middleware, distributed system, remote patient monitoring &, tracking