Method and system for improving the performance of a token ring

Details Method and system for improving the performance of a token ring Method and system for improving the performance of a token ring

1994-12-22

1996-10-15

Hsu, Alpus H.

Multiplex communications

Wide area network

Packet switching

370 8515, 34082505, H04L 12433

Patent

active

055661785

ABSTRACT:
A system and method for implementing a new protocol that uses new data structures in order to improve the performance of a token ring without changing its topology or degrading its fairness. A primary sender sends a data frame containing a data field addressed to a primary receiver. The protocol allows the primary receiver to enter "transmit mode" and assume another role as a secondary sender when the data frame is received and copied. The secondary sender overwrites the data field. Then, the secondary sender designates a secondary receiver to receive the update data and sends an acknowledgement message back to the primary sender to indicate that it has received data. The secondary receiver sends an acknowledgement to the secondary sender when the secondary transmission data is received. The primary sender checks for an acknowledgement from the primary receiver when the data frame returns. Then the primary sender transmits the data frame downstream. The primary sender regenerates a token and either releases it or seizes it based on whether it has more data to send. The secondary sender verifies the acknowledgement from the secondary receiver and returns to "listen mode".

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