Bernhard Firner, Chenren Xu, Richard Howard, and Yanyong Zhang ABSTRACTA typical wireless sensor network consists of many small sensorsthat collect instrument data around their locations andforward it to a central location for data processing. Thesenetworks can be deployed to monitor livestock and agriculturalassets, products in a store, patients in a hospital, andso on. In many cases sensors have to be densely deployed,and collisions or overhead due to collision avoidance willconsiderably degra ...