Distributed ethernet hub

• US 7,356,042 B2
• Filed: 06/21/2002
• Issued: 04/08/2008
• Est. Priority Date: 06/03/1999
• Status: Active Grant

• Current Assignee: Tellabs Bedford, Inc. (Infinera Corp.)
• Original Assignee: Tellabs Bedford, Inc. (Infinera Corp.)
• Inventors: Ethridge, Barry J., Gainer, James J., Whitehead, Joseph L., Kimbrough, Mahlon D.
• Primary Examiner(s): Jung; Min
• Application Number:
  US10/176,542
• Publication Number:
  US 20020163921A1
• Time in Patent Office: 2,118 Days
• Field of Search: 370445-448, 370/352, 370/353, 370/354, 370/419, 370/420, 370/402
• US Class Current: 370/445
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 12/44 Star or tree networks
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04M 7/122 where the PSTN/ISDN access is used as an access to networks other than PSTN/ISDN access arrangements to networks other than PSTN/ISDN H04M7/0066; access arrangements to public data networks H04L12/2856

Abstract

A technique for multiplexing high speed computed data with digitized voice signals onto a fiber optic cable for transfer to a local central office. The data packets of a number of computers are networked by way of a distributed hub that extends to residences, offices, apartments, etc. The data packets are switched outside the switching fabric of a local central office and routed to the internet or elsewhere. Command signals that are for accessing the internet are transmitted and received as 10 MHz Ethernet data packets on the distributed hub.

Claims

1. A distributed network hub, comprising:

at least one transmit line;

first and second transmitters, each coupled to a different end of said transmit line, and each for transmitting data on said transmit line, the first and second transmitters each having a respective separate communication link associated therewith; and

each transmitter including circuits for avoiding a simultaneous transmission of data on said transmit line, and including a respective buffer memory for temporarily storing received data before transmission thereof on said transmit line, and each transmitter determining an idle status on said transmit line and respective communication link in avoiding a simultaneous transmission of data on said transmit line.

2. The distributed network hub of claim 1, wherein said transmit line comprises a fiber optic line.

3. The distributed network hub of claim 1, further including a plurality of transmit lines coupled in series, with associated transmitters coupled to said transmit lines, at least one said transmit line being greater than about 800 feet in length.

4. The distributed network hub of claim 1, wherein each transmitter is associated with a data receiver for transmitting and receiving data on one said transmit line.

5. The distributed network hub of claim 1, further including in combination a computer equipped with an Ethernet LAN card for transmitting and receiving data and coupled to one end of said transmit line.

6. The distributed network hub of claim 1, further including an optical network unit having circuits for sensing collisions of data, and an optical interface unit having circuits for sensing collisions of data, and a transmission medium for carrying data between the optical network unit and the optical interface unit.

7. The distributed network hub of claim 6, wherein said transmission medium comprises an optical fiber.

8. The distributed network hub of claim 6, wherein said transmission medium comprises a DS1 line.

9. The distributed network hub of claim 1, further comprising:

an optical fiber coupled to at least one of the transmitters, wherein data transmitted on the optical fiber is passed to the transmit line and data transmitted on the transmit line is passed to the optical fiber.

10. The distributed network hub of claim 1, wherein each transmitter transmits data on the transmit line in response to an idle status indication on both said transmit line and respective communication link.

11. An optical interface unit, comprising:

an optical duplexer operable to transmit signals to and receive signals from an optical fiber over a communication link;

a gate array unit operable to provide data to and receive data from the optical duplexer, the gate array unit operable to provide data to and receive data from a transmit line, the transmit line being coupled to other gate array units, the gate array unit operable to avoid simultaneous transmission of data with the other gate array units on the transmit line, the gate array unit operable to determine an idle status of both the transmit line and the communication link to avoid simultaneous transmission of data with the other gate array units on the transmit line.

12. An optical interface unit, comprising:

an optical duplexer operable to transmit signals to and receive signals from an optical fiber;

a gate array unit operable to provide data to and receive data from the optical duplexer, the gate array unit operable to provide data to and receive data from a transmit line, the transmit line being coupled to other gate array units, the gate array unit operable to avoid simultaneous transmission of data with the other gate array units on the transmit line;

wherein the gate array unit is operable to separately receive voice signals, digital signals, and data packets, the gate array unit operable to multiplex the voice signals, the digital signals, and the data packets for transport to the optical duplexer, the optical duplexer operable to transmit the multiplexed voice signals, digital signals, and data packets over the optical fiber.

13. An optical interface unit, comprising:

an optical duplexer operable to transmit signals to and receive signals from an optical fiber;

a gate array unit operable to provide data to and receive data from the optical duplexer, the gate array unit operable to provide data to and receive data from a transmit line, the transmit line being coupled to other gate array units, the gate array unit operable to avoid simultaneous transmission of data with the other gate array units on the transmit line;

wherein the gate array unit is operable to receive electrical signals from the optical duplexer corresponding to optical signals received from the optical fiber, the electrical signals including voice signals, digital signals, and data packets, the gate array unit operable to extract the voice signals, digital signals, and data packets from the electrical signal.

14. The optical interface unit of claim 13, wherein the gate array unit is operable to provide the voice signals onto a voice bus, the digital signals onto a digital bus, and the data packets onto a data bus.

15. The optical interface unit of claim 14, wherein the gate array unit is operable to check an idle status on each of the voice bus, the digital bus, and the data bus in order to avoid simultaneous transmissions thereon.

16. A method for data transmission, comprising:

determining an idle status of an input/output line associated with a device and at least one other separate input line associated with the device;

transmitting data on the input/output line in response to the input/output line and the at least one other separate input line being idle in order to avoid simultaneous transmissions thereon.

17. The method of claim 16, further comprising:

demultiplexing voice signals, digital signals, and data packets from the data;

transmitting the data packets on the input/output line.

18. The method of claim 17, further comprising:

separately receiving voice signals, digital signals, and data packets;

multiplexing the voice signals, digital signals, and data packets;

transmitting the multiplexed voice signals, digital signals, and data packets.

19. A method for data transmission, comprising:

receiving data for transmission;

determining an idle status of a transmit line, the transmit line being shared by other transmit units;

transmitting the data on the transmit line in response to the transmit line being idle in order to avoid simultaneous transmissions thereon;

demultiplexing voice signals, digital signals, and data packets from the received data;

transmitting the data packets on the transmit line;

determining an idle status of a voice bus and a digital bus, the voice bus and the digital bus being separate from the transmit line and shared by other transmit units;

transmitting the voice signals on the voice bus in response to the voice bus being idle in order to avoid simultaneous transmissions thereon by multiple transmit units;

transmitting the digital signals on the digital bus in response to the digital bus being idle in order to avoid simultaneous transmissions thereon by multiple transmit units.