Arrangement for accessing media in a network having universal mu

Details Arrangement for accessing media in a network having universal mu Arrangement for accessing media in a network having universal mu

1996-09-17

1998-06-30

Coleman, Eric

39520058, G06F 300

Patent

active

057746583

ABSTRACT:
A network includes a combination of carrier-sense stations and Universal Multiple Access (UMA) stations using a time slot multiple access protocol. The network is configured to include assigned time slots for the respective UMA stations and unassigned time slots reserved for the carrier-sense stations to access the shared network media. Each of the UMA stations is provided with a corresponding assigned time slot and the total number of time slots. Since the UMA stations access the media only during the assigned time slot, the carrier-sense stations can contend for access to the media after waiting a minimum interpacket gap (IPG) after sensing deassertion of the receive carrier on the media. The UMA stations may also be modified to attempt access of the media using Ethernet-compliant, carrier-sense multiple-access with collision detection (CSMA/CD) protocol when a current time slot corresponds to a mixed-use time slot.

REFERENCES:
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patent: 5619496 (1997-04-01), Weir
patent: 5655149 (1997-08-01), Muegge
patent: 5696765 (1997-12-01), Safadi
AMD, AM79C970 PCnet.TM.-Single-Chip Ethernet Controller for PCl Local Bus, Jun. 1994, pp. 1-868-1-1033.
Breyer et al., "Switched and Fast Ethernet: How It Works and How to Use It", Ziff-Davis Press, Emeryville, Calif. (1995), pp. 60-70.
Johnson, "Fast Ethernet: Dawn of a New Network", Prentice-Hall, Inc. (1996), pp. 158-174.

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