Multiplex communications – Channel assignment techniques – Carrier sense multiple access
Patent
1997-07-02
1999-11-02
Olms, Douglas W.
Multiplex communications
Channel assignment techniques
Carrier sense multiple access
370501, H04L 12413
Patent
active
059783850
ABSTRACT:
An improved repeater or hub in a CSMA/CD based LAN that provides deterministic access to a shared communication medium for a limited number of nodes and improves the nondeterministic access latency for up to the maximum number of nodes allowed to be coupled to the repeater without requiring any modification to the adapter in each of the nodes. The repeater prevents a node involved in a collision from detecting that the collision occurred, and transmits the data packet received from that node to all other nodes connected to the repeater. The repeater accomplishes this by repeating the data packet received from that node during the collision, and discarding the data packets received from other nodes, thereby improving the performance of a CSMA/CD LAN by allowing a valid data packet to traverse the repeater and all communication medium segments attached thereto. When selecting which node shall continue transmitting, the repeater gives priority to the node with the currently highest number of outstanding packet retransmission attempts.
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Haddock Steve
Schneider Herb
Extreme Networks, Inc.
Olms Douglas W.
Rao Seema S.
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