29.
11.
2013
Cloud Displays for Mobile Users in a Display Cloud
Otto Anshus
University of Tromsoe
The display cloud model allows users to select local and remote programmable
displays, and add them to a user specific cloud dis- play where the user can
arrange them freely. On a cloud display, the abstraction representing remote
graphical content is termed a visual. It can be positioned and resized freely.
Wherever a visual touches a part of the cloud display with physical displays
present, the physical displays will show the corresponding graphical con- tent
of the visual. The physical displays can simultaneously show several visuals
from one or many users.
The display cloud approach is suitable for public environments because we do
not allow user customization of the displays, a user does not have to expose
any data except the actual graphical content to the display computers, and he
does not have to go through the displays to do user interaction with his
resources. Mobile devices have an essential role in achieving this. They
provide, for each user, the means to detect displays, to add displays to the
user's cloud display, to manage displays and visuals in a cloud display, and to
interact with visuals.
An insight is that the display cloud model is maximally decentralized between
users, and maximally centralized per user. We conducted a set of experiments on
a prototype using 28 display computers with up to 21 users. The results show
that the prototype reacts interactively fast for each, and scales well to many
users.
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