CPSC 689/602--Spring 1997
Computer-Supported Cooperative Work

Paper Report

Title: Collaboration Awareness in Support of collaboration transparency: Requirements for the next generation of shared window systems.
Authors: J.Chris Lauwers and Keith A. Lantz
Citation: CH'90 Proceedings" April 1990
Reprinted in : 663-671 (in "Groupware and Computer-Supported Cooperative Work")

Summary:Introduce a shared-window system in teleconferencing so that the existing single user window application can be brought up and shared by the conference participants.
1. Problems need to be solved: (a) Spontaneous interactions; (b) workspace management; (c) floor control; (d) annotation and telepointing; (e) performance;
2. Architecture of the system: A conference agent sit between the individual windows and applications. All the communications, including among users and the users and the application programs, are mediated through the agents.
3. The related problem of this architecture is on a distributed system where is the agent located? In the circumstances that a large number of participants communication will be the bottle neck of the performance.
4. Implementation Strategy: (a) Canonical centralized architecture. (b) Canonical fully replicated architecture: This will solve some of the performance problems.
5. How to support those features listed in (1):
telepointing: Agent XORing all the user windows.

Report prepared by: Xiaogang Wu , Email: x0w1553@cs.tamu.edu
Discussion date: 3-21-97 Report date: 3-23-97