Multiplex communications – Wide area network – Packet switching
Patent
1991-07-31
1995-01-03
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 941, H04L 1256
Patent
active
053792955
ABSTRACT:
A cross-connect communications system has an identifier separator for separating from a multi-bit header of an ATM cell a first multi-bit identifier to identify a destination of the ATM cell. The separator also separates a single bit broadcast identifier in the header which has first and second bit states and data in an information region of the ATM cell and associated with header information other than the first identifier and the broadcast identifier. A first memory stores a second identifier for obtaining the number of communications nodes to be broadcast and a new destination to which the broadcast is to be made in a position based on the first identifier when the broadcast identifier is in the first state. The first memory also stores a third identifier in a position based on the first identifier when the broadcast identifier is in the second state. An output circuit produces a count value corresponding to the number of nodes stored in the first memory. A second memory stores a fourth identifier corresponding to the destination of the broadcast to be made in a position based on the second identifier and the count value from the output circuit. A first cell assembling circuit assembles a cell to be broadcast from data derived from the information region and the fourth identifier. A second cell assembling circuit assembles a cell not to be broadcast from data derived from the information region and the third identifier. A selector outputs the cell to be broadcast and the cell not to be broadcast through a self-routing switch.
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"Output-buffer Switch Architecture for Asynchronous Transfer Mode", IEEE Communications Society, IEEE International Conference on Communications, Jun. 11-14, 1989, pp. 4.1.1 to 4.1.5 by Hiroshi Suzuki, Hiroshi Nagano, Toshio Suzuki, Takao Takeuchi and Susumu Iwasaki.
NEC Corporation
Olms Douglas W.
Ton Dang
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