Handbook on Mobile and Ubiquitous Computing

A World Model for Smart Spaces

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component can explicitly permit descendent components that belong to a specified group or are

owned by its user to access its services, e.g., PCs or SCs.

3.4.3 Location-Sensor Management System

The model permits us to manually customize the structure of components. Nevertheless, the

model can dynamically configure containment relationships among components according to the

physical world by using location sensing systems. To bridge location sensors and devices that

maintain subtrees, the model introduces location-management systems, called LSMs, outside the

component management systems. Each LSM manages location sensors and exchanges information

between other LSMs in a peer-to-peer manner. This is a lightweight system ...