Abstract:

Wireless sensor networks are widely used and attract more attention, but have the problem of lack of a unified open interface due to the increase of network complexity and network applications. In view of the structure and characteristics of wireless sensor networks, the concept of wireless sensor network middleware technologies is introduced. Based on the comprehensive analysis of problems and challenges confronted by the wireless sensor network middleware, several concrete middleware design approaches are presented, and several typical instances of middleware are compared in some important performance parameters such as QoS support, reliability, mobility, etc. Finally, an improved method in the QoS mechanism of middleware is proposed.

Key words: wireless sensor network;middleware technology;design approaches;QoS mechanism