The development of a dynamic and robust event-based routing protocol in wireless sensor networks for environment monitoring.

Wireless Sensor Network (WSN) technology promises to allow users to monitor fine-grained, dynamic changes in an outdoor landscape. Such systems can be used to improve the local environment but there are significant problems to be overcome in translating this vision into working systems. This paper outlines the challenges and describes the issues involved in the design of a reactive and robust, event-driven routing protocol for environmental monitoring of soil moisture: when the rain falls and soil moisture is changing rapidly, measurements are collected frequently, whereas during dry periods between rainfall events, measurements are collected much less often. Hence any proposed solution must be reactive yet robust in these wireless environments. This paper outlines the challenges in supporting such an environment and demonstrates a solution approach based on the modification of a well known reactive routing protocol, AODV, as well as different routing algorithms that are able to adapt to changes in part or all of the sensor network. Proposals to build a testbed to evaluate the proposed solutions are outlined