A Publish/Subscribe Data Gathering Framework Integrating Wireless Sensor Networks and Mobile Phones
He Huang · KTH Publication Database DiVA (KTH Royal Institute of Technology) · 2010
In this report, we propose a data gathering framework integrating wireless sensors with mobile phones based on the observation that individual mobile devices can serve as supplement to the static deployed wireless sensor networks. The framework employs an intermediate broker network built upon DHT overlay in its basic infrastructure to dispatch data by means of publish/subscribe paradigm. A location based subscription installation is introduced, through which end users can subscribe to their interested events within a specified target location area. Event data notifications are multicast efficiently by the broker network back to the corresponding subscriber clients when they are matched successfully against any subscriptions. In order to support client mobility, we also propose a protocol which implements a client location registration and lookup process as well as a relocation handover process. The protocol leverages the DHT storage of broker nodes to trace client location. It is able to buffer the event data when clients are absent to the framework and replay them efficiently to the new location in case of client relocation.