Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1995-09-14
1998-05-05
Hsu, Alpus H.
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370447, H04L 1246, H04L 1266
Patent
active
057486344
ABSTRACT:
A method and apparatus for implementing a two-port Ethernet bridge using a semaphoring technique. The Ethernet bridge includes two MAC devices, a bus, a memory and a semaphoring scheme. The controllers include a first address which is used for indicating receipt of the packet and a second address which is used for indicating the transmission of the packet from the memory and for clearing of the memory location of the packet for further use. The receiving media access controller receives a data packet on a first port and the transmitting media access controller transmits the packet from the memory to a second port associated with the address of the intended user designated by the packet. The memory includes a dual-ring structure, with one ring used for receive traffic and the other ring used for transmit traffic. The MACs also include programmability for designating the type of packets that may be received. Thus, a particular address on the bus is uniquely designated to carry each message and the address on the bus is independent of the source of the message.
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Ketchum Kevin D.
Sokol Michael A.
Hsu Alpus H.
Level One Communications Inc.
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