Monitor services deployable on device networks may be implemented using a modular approach, in which a core monitor service is mapped to one or more devices included in, or associated with, the device networks. Additional monitoring-related functionality may be provided to such devices using plug-ins,...http://www.google.com.hk/patents/US8131838?utm_source=gb-gplus-share專利 US8131838 - Modular monitor service for smart item monitoring
