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

传感器是可以感知、计算和通信的小型设备。它们可以与作用于真实的世界物体的致动器结合使用。它们通常被组织成无线传感器和执行器网络（WSAN）。它们提供环境信息并对环境世界起作用。环境信息是指与最终用户的情况相关的任何收集的信息，例如位置、速度、血压、心跳、亮度和温度。另一方面，IP多媒体子系统（IMS）是3G电信网络的主要组成部分。它由一个覆盖控制层组成，通过分组交换域实现IP多媒体服务的无缝交付。它是访问不可知的，由两层组成。控制层包括数据库、信令实体、媒体处理实体和互通实体。另一方面，应用层由用于实现增值服务的实体组成并提供能力。

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.