Multiplex communications – Wide area network – Packet switching
Patent
1988-07-22
1989-09-19
Orsino, Joseph A.
Multiplex communications
Wide area network
Packet switching
370 851, H04Q 1104
Patent
active
048688142
ABSTRACT:
A method and apparatus is described for distributing data in a hierarchically connected system (10) comprising a plurality of nodes (12-25) at each of a plurality of hierarchical levels, one or more bidirectional buses (29-30, 31,32) interconnecting mutually exclusive nodes at each hierarchical level, and a sender (49) for receiving and transmitting data located at each node (12-25) for transmitting and receiving data under the Content Induced Transaction Overlap (CITO) protocol and for transmitting and receiving data without regard to the CITO protocol. Each bidirectional bus (27-32) is interconnected through a node to a node on a bidirectional bus at a higher hierarchical level. Several virtual buses may be formed for distribution of the messages over one or more bidirectional buses (27-33) by controlling the senders (90,92,94,96) at each node by a slot controller (88) which activates the senders (90,92,94,96) as a function of time slot. The invention overcomes the problem of distributing data to all nodes (12-25) in a hierarchically connected system as well as to nodes (14-17 ) at a selected hierarchical level or to nodes (18-19) hierarchically connected subordinate to a node (14).
REFERENCES:
patent: 4493074 (1985-01-01), Walter et al.
patent: 4628504 (1986-12-01), Brown
patent: 4677611 (1987-06-01), Yanosy, Jr. et al.
Berkovich Semyon
Walter Chris J.
Yee Henry C.
Allied-Signal Inc.
Massung Howard G.
Orsino Joseph A.
Scutch III Frank M.
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