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Nt1310 Unit 1 Operating Systems And Devices Essay

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III. Device: A “device” is used to achieve the association between virtual and physical entity. This is done by embedding, attaching or simply placing the device in close proximity to the physical entity. Devices provide the technological interface for interacting with or gaining information about the physical entity. By so doing the device actually enhances the physical entity and allows the latter to be part of the digital world. A device thus mediates the interactions between physical entities (that have no projections in the digital world) and virtual entities (which have no projections in the physical world), generating a paired couple that can be seen as an extension of either one. Devices are thus technical …show more content…

Actuators can move (translate, rotate, etc.) simple physical entities or activate/deactivate functionalities of more complex ones. IV. Sensor Operating Systems: Most operating systems (OS) that may be used for IoT were designed for wireless sensor networks (WSN) like TinyOS and Contiki RIOT. OSs for sensor nodes follows either one of two different design concepts, event-driven and multi-threaded. In event-driven systems every action an OS has to perform is triggered by an event (e.g., a timer, an interruption indicating new sensor readings or an incoming radio packet). The multi-threaded OS multiplexes execution time between the different tasks, implemented as threads. While switching from one thread to another, the current context has to be saved and the new context must be restored. As I have done my extensively on TinyOS so further I will discuss about TinyOS. V. …show more content…

These three models are:  A model based specifically on read-only RFID data carriers  Additional Object Connected data model based specifically on RFID (ostensibly with read-write functionality and added data-carrying capability)  Additional Object Connected data model based on RFID and other Edge technologies (ostensibly covering sensory data capture, extended data-carrying capability and other attributes such as location or positioning facilities) The most basic model for IoT has data carriers which are essentially passive RFID tags carrying unique identifiers, with each tag having the capability for interrogation and response via a wireless channel. There is no intrinsic processing capability within the tags and no facility for communications between tags. Applications using these data carriers rely upon the identifier as the means of locating remotely stored information about the item to which it is attached. The tags are interrogated using reader or interrogator devices that have the facility to communicate wirelessly with the tags and further communicate with an

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