| Suchitra Raman and Teck-Lee Tung. Mediaboard using the Scalable Reliable Multicast Toolkit. Class report, UC Berkeley, December 1996. |
....devices such as PDAs. 3.1 Shared Whiteboard Proxy for PDAs The original electronic shared whiteboard application, wb [25] was developed at the Lawrence Berkeley Laboratory. Based on their experiences with wb, researchers at UC Berkeley have built a secondgeneration whiteboard tool, mediaboard [32]. This application allows a diverse set of media to be created and displayed interactively by a group of users sharing a multicast session. A mediaboard session consists of a shared presentation space that is divided into a number of canvas pages. It supports traditional whiteboard data types such ....
Raman, S., and Tung, T.-L. Mediaboard using the Scalable Reliable Multicast Toolkit. Class report, UC Berkeley, Dec. 1996.
....it does not have the floor. We resolve this by using a receiver based approach, where the receiver agents mute out non floor holders. This allows receivers to have full control over what data they receive. 4.4. 2 Scalable Reliable Multicast (SRM) Our protocol is built on top of the SRM toolkit [RT96] developed by researchers in the MASH research project at Berkeley. SRM is a protocol layer build on top of IP Multicast that provides reliability in a scalable manner. The protocol was developed out of an implementation of the shared whiteboard tool, wb [JMb] SRM uses a receiver based NACK ....
....the application. SRM is designed around these principles to provide the minimum necessary functionality; all higher level notions of application data units (ADUs) 6 ADU naming, policy decisions for making repairrequests responses, etc. are left to the application to tailor to its own needs. [RT96] implemented an initial version of the SRM protocol. They provide a general SRM toolkit implemented as a set of C classes that can be customized by user applications. The main classes include the Session Manager, which is responsible for setting up the network objects required to join the ....
Suchitra Raman, Teck-Lee Tung "MediaBoard Using the Scalable, Reliable Multicast Toolkit" Class Report, UC Berkeley 1997
....applications. IP Multicast [Dee91, DEF 96] provides an efficient mechanism for multi point data delivery. The new class of multi party applications enabled by IP Multicast includes a variety of audio and video conferencing tools [Sch92, MJ95, JM] shared whiteboards and text editors [McC92, RT96, HC97] and floor control applications [MR97] If computer supported collaboration is to become successful and mainstream, it must at the very least provide functionality that was previously unavailable in face to face meetings. By harnessing the computing technology at our disposal today, ....
Suchitra Raman and Teck-Lee Tung. Mediaboard using the Scalable Reliable Multicast Toolkit. Class report, UC Berkeley, December 1996.
....applications. IP Multicast [Dee91, DEF 96] provides an efficient mechanism for multi point data delivery. The new class of multi party applications enabled by IP Multicast includes a variety of audio and video conferencing tools [Sch92, MJ95, JM] shared whiteboards and text editors [McC92, RT96, HC97] and floor control applications [MR97] If computer supported collaboration is to become successful and mainstream, it must at the very least provide functionality that was previously unavailable in face to face meetings. By harnessing the computing technology at our disposal today, ....
....until a server reflection is heard. 4 Implementation We have implemented the core SSAC protocol in a distributed archive server which we call MARS (MASH ARchive Server) and a client application, the MARS rover. We utilize the established MBone tools vic [MJ95] vat [JM] and mediaboard [RT96] for transmitting content. We have recorded around 20 Gigabytes of content from MBone lectures, research group meetings, and local classes, and provide access to these sessions through the MARS system. 4.1 Client Application A screen shot of our client application, MARS rover, is shown in Figure ....
Suchitra Raman and Teck-Lee Tung. Mediaboard using the Scalable Reliable Multicast Toolkit. Class report, UC Berkeley, December 1996.
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