Integrating the capabilities of wireless sensor and actuator networks in the IP Multimedia Subsystem

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Sensors are small devices that can sense, compute and communicate. They can be used in conjunction with actuators that act upon real world objects. They are usually organized into wireless sensors and actuator networks (WSAN). They provide ambient information and act upon the ambient world. Ambient information refers to any collected information that is relevant to the situation of an end-user, e.g. location, velocity, blood pressure, heartbeat, luminosity and temperature. The IP Multimedia Sub-system (IMS) on the other hand is the main component of 3G telecommunication networks. It consists of an overlay control layer that enables the seamless delivery of IP multimedia services via the packet switched domain. It is access agnostic and made up of two layers.. The control layer comprises databases, signaling entities, media handling entities and inter-working entities. The application layer on the other hand consists of entities for enabling valued added services and provides capabilities.