Supporting distributed private and public user interfaces in urban environments

Abstract

Proliferation of large public displays in urban cityscape gives rise to applications distributed between public displays and mobile devices. However, real deployment of distributed applications on top of this new infrastructure is challenging as no commonly accepted architectural solutions exist to rely on. In this paper, we present a platform supporting distributed application user interfaces on interactive large public screens and personal mobile devices. We demonstrate the functionality and potential of our approach by presenting a deployment of the platform with multiple distributed applications in authentic setting in a city center. We found this platform feasible to deploy interactive, appealing services on top of, and a non-cost information pick-up service as the most appealing to users.

Leasing Service for Networks of Interactive Public Displays in Urban Spaces

“…In case of social leases, each lease is considered individually in the overall amount. The durations of the leased interaction sessions had an average of 1:33 minutes, which is in accordance with the types of applications [12] that were developed and utilized on top of this service. Reflecting the latency measurement to this duration yields a signaling overhead percentage of (26ms + 473ms + 260ms + ~500ms) / 93000ms * 100% = 1.35%.…”

“…Mobile terminals implement the client sides of discovery and leasing services, and feature dedicated launcher software for starting distributed applications [12]. In addition, each mobile terminal has an associated RFID tag with its unique ID linked to the terminal by a lookup table in the middleware backend server.…”

“…Each of the phases in this sequence is initiated by the user, and after each phase the user is presented with options regarding continuation, through the mobile terminal GUI [12]. After the lease is granted, user is notified on the mobile terminal screen to choose an application to start, which then leads to launching phase.…”

“…We have also suggested the need for the discovery process to be augmented with a negotiation phase prior to application composition and usage [11]. Finally, we have reported how the application data tier can be separated from the runtime presentation tier in case of applications utilizing both public displays and mobile devices [12].…”

Pervasive Social Computing: augmenting five facets of human intelligence

“…UBI-hot spot provides one example of such visual interaction awareness (Hosio et al 2010). In these applications, the large display alternates between a passive broadcast mode and an active mode, based on face detection and other mechanisms.…”