Prediction-based decorators for distributed collaborative haptic virtual environments Online publication date: Thu, 14-Jun-2007
by Azzedine Boukerche, Shervin Shirmohammadi, Abu Hossain
International Journal of Computer Applications in Technology (IJCAT), Vol. 29, No. 1, 2007
Abstract: Haptic Collaborative Virtual Environments, like other collaborative environments, are adversely affected by the inherent network lag, caused by delay, jitter, or packet loss, when users are geographically distributed. In this paper, we propose an approach based on both decorators and prediction to compensate for network delays and lost updates. Our approach adds to existing networking-level techniques a history buffer, and a decorator-based predictor at the receiving side and can improve the quality of collaboration as perceived by the remote users. The predictor can determine lost-update messages to improvise the current state, guess the current network delay, and anticipate remote user's interaction strategy and virtual object's position/orientation based on the history, while the decorator will act as a visual cue to inform the user about current network conditions such as the amount of lag experienced; this allows the user to cope with the lag from a human-machine interface point of view.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Computer Applications in Technology (IJCAT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook