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Proceedings Paper

Design issues for floor control protocols
Author(s): Hans-Peter Dommel; Jose J. Garcia-Luna-Aceves
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Paper Abstract

Floor control allows users of networked multimedia applications to remotely share resources like cursors, data views, video and audio channels, or entire applications without access conflicts. Floors are mutually exclusive permissions, granted dynamically to collaborating users, mitigating race conditions and guaranteeing fair and deadlock- free resource access. Although floor control is an early concept within computer-supported cooperative work, no framework exists and current floor control mechanisms are often limited to simple objects. While small-scale collaboration can be facilitated by social conventions, the importance of floors becomes evident for large-scale application sharing and teleconferencing orchestration. In this paper, the concept of a scalable session protocol is enhanced with floor control. Characteristics of collaborative environments are discussed, and session and floor control are discerned. The system's and user's requirements perspectives are discussed, including distributed storage policies, packet structure and user-interface design for floor presentation, manipulation, and triggering conditions for floor migration. Interaction stages between users, and scenarios of participant withdrawal, late joins, and establishment of subgroups are elicited with respect to floor generation, bookkeeping, and passing. An API is proposed to standardize and integrate floor control among shared applications. Finally, a concise classification for existing systems with a notion of floor control is introduced.

Paper Details

Date Published: 14 March 1995
PDF: 12 pages
Proc. SPIE 2417, Multimedia Computing and Networking 1995, (14 March 1995); doi: 10.1117/12.206056
Show Author Affiliations
Hans-Peter Dommel, Univ. of California/Santa Cruz (United States)
Jose J. Garcia-Luna-Aceves, Univ. of California/Santa Cruz (United States)


Published in SPIE Proceedings Vol. 2417:
Multimedia Computing and Networking 1995
Arturo A. Rodriguez; Jacek Maitan, Editor(s)

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