Multiplex communications – Wide area network – Packet switching
Patent
1992-12-24
1994-09-27
Chin, Wellington
Multiplex communications
Wide area network
Packet switching
370 943, H04L 1244
Patent
active
053512413
ABSTRACT:
A hub in a star local area network (LAN). A single station, called the preferred station, is dynamically selected to perform a transmission. When two or more stations attempt to transmit simultaneously, one currently preferred station goes through, while all others sense collisions. The currently preferred station is dynamically selected by performing a precedence algorithm which is a fairness and deterministic algorithm. If the station receiving from the preferred station also attempts to transmit, then it senses a collision and the hub lets it recover and enable itself for receiving before transmitting the frame. This is done by storing the preferred station frame in an internal small first-in first-out (FIFO) buffer. The hub resends the frame from the FIFO immediately after Inter Frame Spacing (IFS) while the receive station attempts to transmit later. If after a number of attempts the hub does not succeed in transmitting the frame successfully, then the hub generates a collision frame.
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Chin Wellington
Intel Corporation
Lamb Owen L.
Vu Huy D.
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