Repeater interface controller with multiple port node interfaces

• US 5,299,195 A
• Filed: 08/14/1992
• Issued: 03/29/1994
• Est. Priority Date: 01/18/1991
• Status: Expired due to Term

• Current Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Original Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Inventors: Shah, Haresh K.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): MARCELO, MELVIN C
• Application Number:
  US07/930,712
• Time in Patent Office: 592 Days
• Field of Search: 370/60, 370/94.1, 370/94.3, 370/13.1, 370/85.6, 370/85.9, 370/85.11, 370/85.12, 370/85.13, 370/95.3, 370/97, 340/825.5, 340/825.02
• US Class Current: 370/462
• CPC Class Codes: H04L 12/44 Star or tree networks
• CPC Class Codes: H04L 12/46 Interconnection of networks
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 43/0847 Transmission error
• CPC Class Codes: H04L 43/16 Threshold monitoring

Abstract

A repeater interface controller receives a data packet at one of a plurality of port nodes from an associated segment of a local area network. At least one port node is configurable as either an attachment unit interface or a twisted pair interface. The port nodes determine a priority port node, of more than one port node receives a data packet at substantially the same time, and transmit the data packet from the priority port node to a central node. The central node receives the data packet from the priority node, repeats the data packet, and transmits the repeated data packet to the non-priority port nodes. Each non-priority port node receives the repeated data packet and transmits the repeated data onto its associated segment.

Claims

1. A repeater interface controller for connecting a plurality of segments of a local area network, the repeater interface controller comprising:

(a) a central node that includes;

central receiver means for receiving data packets,

decoder means responsive to receipt of the data packets for decoding each of the data packets received by the central receiver means to form decoded data packets;

repeater means responsive to receipt of the decoded data packets for repeating each of the decoded data packets to form repeated data packets, and

central transmitter means for transmitting the repeated data packets; and

(b) a plurality of port nodes connected to the central node, each port node being connectable to a corresponding one of the plurality of segments, at least one port node including;

(i) first port receiving means for receiving one or more encoded data packets from an external interface connected to said corresponding segment of the local area network, the first port receiver means including means for supporting one of a plurality of different external interfaces,

(ii) first port transmitter means for transmitting each of the one or more encoded data packets to the central node,

(iii) priority means for identifying the port node that first received one or more data packets as a source port node such that other of the plurality of port nodes cannot transmit data packets received from their corresponding segments to the central node while said port node is identified as the source port node,

(iv) second port receiver means for receiving the repeated data packets from the central node, and

(v) second port transmitter means for transmitting the repeated data packets received from the central node to said corresponding segment when said port node is not identified as the source port node.

2. The repeater interface controller as in claim 1 wherein the plurality of different external interfaces includes a 10BASE-2 interface.

3. The repeater interface controller as in claim 1 wherein the first port receiver means comprises:

an internal 10BASE-T receiver;

a bypass circuit;

a plurality of interface pins; and

switching means for connecting either the internal 10BASE-T receiver or the bypass circuit to the the plurality of interface pins.

4. The repeater interface controller of claim 3 wherein the plurality of interface pins comprises the six interface pins of an attachment unit interface.

5. The repeater interface controller of claim 1 wherein the plurality of different external interfaces includes an attachment unit interface.

6. The repeater interface controller as in claim 1 wherein the plurality of different external interfaces includes a 10BASE-T interface.

7. The repeater interface controller as in claim 1 wherein the second port transmitter means comprises:

an internal 10BASE-T transmitter;

a bypass circuit;

a plurality of interface pins; and

switching means for connecting either the internal 10BASE-T transmitter or the bypass circuit to the plurality of interface pins.

8. The repeater interface controller of claim 7 wherein the plurality of interface pins comprises the six interface pins of an attachment unit interface.

9. The repeater interface controller of claim 1 wherein the first port receiver means further comprises multifunction input squelch means for squelching encoded data packets received from each of the plurality of different external interfaces.

10. The repeater interface controller of claim 9 wherein the multifunction squelch means comprises:

a direct current threshold squelch circuit;

a input signal pulse width/direct current threshold squelch circuit;

a plurality of interface pins, and

switching means for connecting either the direct current threshold squelch circuit or the input signal pulse width/direct current threshold squelch circuit to the plurality of interface pins.

11. The repeater interface controller of claim 10 wherein the plurality of interface pins comprises the six interface pins of an attachment unit interface.

12. The repeater interface controller of claim 1 wherein the second port transmitter means further comprises multifunction output driver means for driving repeated data packets received from the central node to each of the plurality of external interfaces.

13. The repeater interface controller of claim 12 wherein the multifunction output driver means comprises:

a current driver circuit;

a voltage driver circuit;

a plurality of interface pins; and

switching means for connecting either the current driver circuit or the voltage driver circuit to the plurality of interface pins.

14. The repeater interface controller of claim 13 wherein the plurality of interface pins comprises the six interface pins of an attachment unit interface.