Media access controller

Details Media access controller Media access controller

1993-07-16

1995-01-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, H04L 1246, H04J 326

Patent

active

053792890

ABSTRACT:
A media access controller is provided by the present invention. A feature of the media access controller of the present invention is a content addressable memory architecture whereby address filtering is provided for filtering physical, group and broadcast addresses on an Ethernet network. Another feature of the present invention is an interface architecture capable of supporting external address filters which in turn are capable of supporting spanning tree and source routing algorithms. Still another feature of the present invention is a CRC checker having improved testability such that burdensome computations for input bit test patterns are no longer required. Still another feature of the present invention is a first-in, first-out memory register having validity bits associated with each stored data byte, such that data bytes may be indiscriminately stored, regardless of their validity, and invalid data bytes are discarded during retrieval of the stored data bytes.

REFERENCES:
patent: 4661951 (1987-04-01), Segarra
patent: 4730308 (1988-03-01), Friedman et al.
patent: 4737953 (1988-04-01), Koch et al.
patent: 4742572 (1988-05-01), Yokoyama
patent: 4787083 (1988-11-01), Tanaka
patent: 4879715 (1989-11-01), Nakabayashi et al.
patent: 4903016 (1990-02-01), Murai et al.
patent: 4916692 (1990-04-01), Clarke et al.
patent: 4933846 (1990-06-01), Humphrey et al.
patent: 5050165 (1991-09-01), Yoshioka et al.
patent: 5058109 (1991-10-01), Goldberg et al.
patent: 5081621 (1992-01-01), Sugimoto
Intel advance data sheets (pp. 1-63) for "82596CA High-Performance 32-Bit Local Area Network Coprocessor".
Intel data sheets (pp. 1-1-1-37) for "82586 Local Area Network Coprocessor".
Intel data sheets (pp. 4-235-4-237) for "386.TM. DX Microprocessor".
Motorola MC68030 User's Manual (pp. 7-5-7-25).
"Spanning Tree Bridges: Transparent Bridges for Interconnection of IEEE 802 LANs," by Floyd Backes (IEEE Network, vol. 2, No. 1, Jan. 1988, pp. 5-9).
"Source Routing Bridges: Addressing Bridging, and Source Routing," by Roy C. Dixon and Daniel A. Pitt (IEEE Network, vol. 2, No. 1, Jan. 1988, pp. 25-32).
Dave Bursky, "Content-Addressable Memory Does Fast Matching", Electronic Design, vol. 36. No. 27, Dec. 8, 1988, pp. 119-121.
Bernard C. Cole, "Content-Addressable Memories Catch On", Electronics, vol. 61, No. 18, Dec. 1988, pp. 82-84.
Advanced Micro Devices' data sheets (pp. 1-28) for "Am99C10 256.times.48 Content Addressable Memory".
Advanced Micro Devices' advanced data sheets (pp. i-vi, 1-106) for "Am79C900 Integrated Local Area Communications Controller (ILACC)".

Affiliated with

Also associated with

Rating

Media access controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Media access controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Media access controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2216587