| On one hand, Wireless Sensor Networks (WSNs) are a research area that has been gaining attention from the research community. They are made up of small scale devices called sensors that can sense, compute and communicate. Moreover, including mobile sinks in WSNs has shown to be useful in a wide range of scenarios since they can improve the overall network lifetime and increase data capacity. On the other hand, the IP Multimedia Subsystem (IMS) aims to provide cellular access to all Internet services. It is an overlay control layer on top of an IP layer whose goals is based in provisioning of Quality of Service (QoS), a fair charging scheme and integrated services through standard interfaces. Combining the capabilities of IMS with the rich set of contextual information captured by mobile sink WSNs opens the door to a wide range of novel multimedia services. This dissertation proposes an overlay architecture for the integration of IMS with mobile sink-based WSN. The Presence service is used as entry point to the IMS world. The gateway which is the heart of our architecture is an overlay built on top of the very same mobile phones that act as mobile sinks, presence publishers / watchers, and end-user devices. |
