Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1994-10-05
1997-10-21
Olms, Douglas W.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
370388, 370389, 370455, 34082551, 3408258, H04Q 1104
Patent
active
056804024
ABSTRACT:
A dual priority switching apparatus for making input port to output port connections on a requested basis quickly and dynamically, in a standard mode from any one of the input ports to a fixed number of subsets of multiple output ports simultaneously, or in a broadcast mode from any one of the input ports to all output ports simultaneously. The apparatus permits multiple broadcasts to be queued at the individual switching apparatus which resolves the broadcast contention on a synchronous priority driven basis that permits one broadcast to follow the other at the earliest possible moment and the quickest possible speed. The apparatus permits multiple multi-cast operations to occur simultaneously within the network. The multi-cast function permits subsets of nodes assigned to the same tasks to communicate among themselves without involving other nodes that are not in its own subset. Hardware circuitry detects and corrects deadlock conditions in the multi-stage network. The hardware circuitry detects all the different types of deadlock conditions automatically and issues correction indications to the network paths involved. The network deadlock is thereby eliminated, and the two broadcasts or multi-casts involved continue their operation in a rearranged sequence that will not cause deadlock.
REFERENCES:
patent: 4078228 (1978-03-01), Miyazaki
patent: 4701906 (1987-10-01), Ransom et al.
patent: 4706080 (1987-11-01), Sincoskie
patent: 4707853 (1987-11-01), Hasegawa
patent: 4754395 (1988-06-01), Weisshaar et al.
patent: 4766592 (1988-08-01), Baral et al.
patent: 4815105 (1989-03-01), Bottoms et al.
patent: 4818984 (1989-04-01), Chang et al.
patent: 4835674 (1989-05-01), Collins et al.
patent: 4855899 (1989-08-01), Presant
patent: 4897834 (1990-01-01), Peterson et al.
patent: 4926375 (1990-05-01), Mercer et al.
patent: 4935866 (1990-06-01), Sauvajol et al.
patent: 4941084 (1990-07-01), Terada et al.
patent: 4956772 (1990-09-01), Neches
patent: 4965788 (1990-10-01), Newman
patent: 5007052 (1991-04-01), Flammer
patent: 5033108 (1991-07-01), Lockwood
patent: 5157654 (1992-10-01), Cisneros
patent: 5189665 (1993-02-01), Niehaus et al.
patent: 5250943 (1993-10-01), Childs et al.
patent: 5303383 (1994-04-01), Neches et al.
patent: 5365228 (1994-11-01), Childs et al.
patent: 5404461 (1995-04-01), Olnowich et al.
patent: 5440549 (1995-08-01), Min et al.
IBM TDB, vol. 30, No. 1, Jun. 1987, pp. 72-78 "Poll Actuated Multiple Access Technique for Broadgath . . . ".
IBM TDB, vol. 22, No. 12, May 1980, pp. 5450-5052 "Distributed Star Network with Unrooted Tree Topology".
Seventh Annual Joint Conference of the IEEE Computer and Communications Societies, Mar. 1988, "The Architecture of a Multicast Broadband Packet Switch", pp. 1-8, by T. T. Lee et al.
IBM Technical Disclosure Bulletin, vol. 34, No. 8, Jan. 1992, "XNL Switch And Its Control", published anonymously.
IBM TDB vol. 33, No. 5, Oct., 1990, "Asynchronous Digital Video Switching System", by Farrell et al, pp. 227-233.
H. S. Stone, `Priority-Resolution Mechism for Reducing Collisions in a multi-processor Interconnection Network.` IBM Technical Disclosure Bulletin vol. 32 No. 4A (1989) 338-341.
Barker Thomas Norman
Kogge Peter Michael
Olnowich Howard Thomas
Vandling, III Gilbert Clyde
Hom Shick
International Business Machines - Corporation
Mobley Michele A.
Olms Douglas W.
Shkurko Eugene I.
LandOfFree
Priority broadcast and multi-cast for unbuffered multi-stage net does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Priority broadcast and multi-cast for unbuffered multi-stage net, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Priority broadcast and multi-cast for unbuffered multi-stage net will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1012733