Multiplex communications – Wide area network – Packet switching
Patent
1995-05-22
1996-06-11
Marcelo, Melvin
Multiplex communications
Wide area network
Packet switching
370 852, H04J 314
Patent
active
055263550
ABSTRACT:
A technique for modifying the IEEE 802.3 standard for selecting transmit-to-transmit interpacket gap (IPG) intervals in a Carrier Sense Multiple Access with Collision Detection (CSMA/CD) network, to provide fairness and good channel utilization in the event that a node has captured the network communication channel. If there is a small number of active nodes on the network, one node may capture the channel and the standard backoff algorithm makes it increasingly unlikely for another node to transmit. The new technique provides for use of a longer interpacket gap (IPG) interval to be used by a node that has been initially unsuccessful in contention for the channel, thereby ensuring that the other node may continue to transmit back-to-back data packets without interruption or collision. After a preselected time interval, the nodes reverse their roles by selecting the opposite IPG intervals. The initial receiver now selects the shorter IPG interval and captures the channel for the preselected time interval.
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Spragins, Telecommunications Protocols and Design, 1991 by Addison-Wesley Publishing Co., Inc.
Hawe William R.
Lauck Anthony G.
Ramakrishnan Kadangode K.
Yang Henry S.
Digital Equipment Corporation
Kozik Kenneth F.
Marcelo Melvin
Vu Huy D.
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