Figure 1

The Titan framework for pervasive applications comprises tiny tasks running on Titan nodes in the PAN (left), a mobile device (center) and Internet application repositories (right). The network manager on the mobile phone collects device and service information available in the PAN in its service directory. It provides this information to application repositories on the Internet. These repositories compose possible applications at runtime and send the resulting service graphs back to the network manager, which maps the services onto individual nodes for execution.