Multiplex communications – Wide area network – Packet switching
Patent
1996-04-18
1999-02-02
Asta, Frank J.
Multiplex communications
Wide area network
Packet switching
39520035, 39520036, 370260, 370261, 370264, 370265, 370270, 379 9304, 379 9321, H01N 1300
Patent
active
058676538
ABSTRACT:
A distance learning system consists of a plurality of multi-cast clients of various classes and priorities with one multi-cast client as a primary multi-cast client, a multi-cast server, arbitrator and a distance learning session coordinator. The primary multi-cast client provides the default or primary Audio-Visual Material (AVM) stream. The Multi-Cast Server (MCS) setups a multi-cast over a point to multi-point connection which connects all multi-cast clients that are to take part in a particular distance learning session, along with the Primary multi-cast client. Additionally, the primary multi-cast client is connected to the MCS via a point-to-point link. The multi-cast clients and the primary multi-cast client receive an AVM material stream from the multi-cast server via the point to multi-point connection. When a multi-cast client wishes to speak, a speaking request is sent to the arbitrator, the arbitrator determines whether to grant or deny the speaking request. If permission is granted then a point-to-point link is established between the requesting multi-cast client and the MCS. The requesting multi-cast client then provides an AVM stream to the multi-cast server over the newly established point-to-point connection and the multi-cast server switches or provides the AVM stream associated with the requesting multi-cast Client over the point to multi-point connection. When the requesting multi-cast client is through speaking the MCS switches the AVM stream associated with the primary multi-cast client onto the point to multi-point connection and the point-to-point link with the requesting multi-cast client is terminated.
REFERENCES:
patent: 5003532 (1991-03-01), Ashida et al.
patent: 5179551 (1993-01-01), Turner
patent: 5227875 (1993-07-01), Suu et al.
patent: 5257306 (1993-10-01), Watanabe
patent: 5305311 (1994-04-01), Lyles
patent: 5309433 (1994-05-01), Cidon et al.
patent: 5325356 (1994-06-01), Lyles
patent: 5345558 (1994-09-01), Opher et al.
patent: 5402415 (1995-03-01), Turner
patent: 5408465 (1995-04-01), Gusella et al.
patent: 5440549 (1995-08-01), Min et al.
patent: 5473367 (1995-12-01), Bales et al.
patent: 5491508 (1996-02-01), Friedell et al.
Oikarinen et al., "Internet Relay Chat Protocol", RFC 1459, http://www.irchelp.org/irchelp/rfc 1459.html, May 1993.
Bagwell et al., "Achieving IP-Multicast Functionality in the Asynchronous Transfer Mode Environment", Southeastern, 1995 IEEE Conference Proceedings, 1995.
CWSApps--16-bit IRC Apps, http://cws.internet.com/16irc.html, Apr. 14, 1998.
IBM Technical Report TR29.2048, Aug. 1995, "Multicast in an IP and ATM Environment", A. M. Gallo.
Aras Caglan M.
Guerin Roch A.
Lebizay Gerald
Onvural Raif O.
Shippy Gary Roy
Asta Frank J.
Flynn John D.
International Business Machines - Corporation
Patru Daniel
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