Context Acquisition

Acquiring context is based on five factors which are responsibility, frequency, context source, sensor type and process of acquisition [1]. Based on responsibility Responsibility factor is about who is making the decision on sensing and communication, either the sensor hardware or user software. This method of context acquisition is called push and pull. It is…

Context Aware Computing

A survey has been conducted by Perera et al. [1] on the functionalities of Middleware for IoT. Functionalities that have been considered are device management, interoperation, platform portability, context-awareness, and security and privacy. The survey shows majority of Middleware solution do not provide context-awareness functionality. According to Abowd and Dey [2], context is defined as…

Sensors for Context Aware System

There are two categories of sensors for healthcare application. The first category is called ambient sensors. Ambient sensor is used to monitor the general activity patterns based on spatial and temporal information processing. Examples of ambient sensors are fall detectors, door monitors, bed alerts, pressure mats, smoke and heat alarms etc. More recent works on…

Middleware for Networked Embedded Systems for IOT

Amount of different devices (sensor nodes) interacting in an IOT environment is big. These devices must be able to connect to each other despite their different network technologies. Furthermore, the devices also require service discovery procedures as well as means to enforce semantic compatibility between devices. These requirement create a demand for a software layer…

The “Internet of Things”

Internet of Things refers to the virtual interconnection of identifiable objects which is like the Internet-structure. The identifiable objects (nodes) could be any devices around us that contains embedded technology which can sense and communicate with its external environment. This interconnection forms a network of billion physical nodes, and by the year of 2020 it…