Design and implementation of service framework for presence sensing in home network system

To achieve efficient presence sensing within home network system (HNS), an inexpensive and elastic system that can be shared by various HNS applications is required. This paper presents Presence Sensor Service Framework, which can uniformly manage presence information in various places using various types of sensors. The framework consists of Presence Sensor Device (PSD), Presence Sensor Terminal (PST) and Presence Sensor Aggregator (PSA). A PST monitors PSDs to detect any changes of presence, and notifies a PSA of the changes. Upon the notifications from PSTs, the PSA estimates human presence around each PSD. The estimation process is deployed as Presence Sensor Service (PSS), which is used by various HNS applications. The proposed framework can dynamically add or change sensing places within a HNS by adding PST and PSD as needed. It can also integrate presences in multiple HNSs by deploying PSA on an external cloud. In this paper, we implement a prototype of the proposed framework by using Phidgets sensors and Java Web service. Moreover, we develop a presence visualization application to conduct a preliminary evaluation.