Expandable ethernet network repeater unit

• US 5,949,818 A
• Filed: 08/27/1997
• Issued: 09/07/1999
• Est. Priority Date: 08/27/1997
• Status: Expired due to Fees

• Current Assignee: Winbond Electronics Corporation
• Original Assignee: Winbond Electronics Corporation
• Inventors: Chiou, Bin-chi
• Primary Examiner(s): Bocure, Tesfaldet
• Application Number:
  US08/919,010
• Time in Patent Office: 741 Days
• Field of Search: 375/211, 375/212, 375/219, 370/445, 370/401, 370/246
• US Class Current: 375/211
• CPC Class Codes: H04B 3/36 Repeater circuits H04B3/58 takes precedence
• CPC Class Codes: H04L 12/44 Star or tree networks
• CPC Class Codes: H04L 49/351 for local area network [LAN], e.g. Ethernet switches
• CPC Class Codes: H04L 49/40 Constructional details, e.g. power supply, mechanical construction or backplane

Abstract

An expandable repeater includes N repeater units connected to an integrator device in a star topology. Each of the N repeater units has an input/output ("I/O") port for exchanging clock, data, and status signals. The status signals indicate the data repetition status of the repeater unit to the integrator. The integrator has N I/O interfaces (where N is the number of repeater units to be combined by the integrator), each of which couples to a corresponding I/O port of a repeater unit. The integrator selectively executes the data and clock repetition, and provides a global network status signal in response to the status signals received from all of the repeater units connected to the integrator.

Claims

1. An expandable repeater integrator for coordinating a plurality of repeater units, each repeater unit being configured for connection to at least one data terminal and having a repeater unit input/output (I/O), the repeater unit I/O configured to transmit and receive data, timing, and status information, the integrator comprising:

a. a plurality of repeater unit/integrator interfaces, each interface connected to one of the plurality of repeater unit I/Os and configured to exchange data, timing, and status information with the repeater unit I/O;

b. a network status monitor configured to receive status information from each repeater unit/integrator interface, to generate a global network status signal, and to transmit the global network status information to each repeater unit/integrator interface; and

c. a data handler configured to receive from one of the plurality of interfaces data and timing information, and to transmit to the other of the plurality of repeater unit/integrator interfaces the received data and timing information;

wherein the plurality of repeater units operate as a single repeater.

2. The integrator of claim 1, wherein the repeater unit/integrator interfaces further comprise:

a. an interface I/O connected to the repeater unit I/O;

b. a status decoder connected to the interface I/O and the network status monitor; and

c. a data flow controller connected to the interface I/O, the data handler, and the network status monitor.

3. The integrator of claim 2, wherein the interface I/O is configured to receive status information from the repeater unit I/O.

4. The integrator of claim 2, wherein the interface I/O is configured to provide data, timing, and status information to the repeater unit I/O and the data flow controller, and to provide status information to the status decoder.

5. The integrator of claim 4, wherein the status decoder is configured to decode the status information received from the interface I/O and to assert to the network status monitor a decoded status signal.

6. The integrator of claim 4, wherein the data flow controller is configured selectively to receive output data and timing information from the interface I/O and to transmit the output data and timing information to the data handler and to receive input data and timing information from the data handler and transmit the input data to the interface I/O.

7. The integrator of claim 4, wherein the data flow controller is configured to receive status information from the interface I/O, to receive the global network status information signal from the network status monitor, and to transmit the global network status information signal to the interface I/O.

8. The integrator of claim 1, wherein the plurality of repeater units are connected to the integrator in a star topology.

9. The integrator of claim 1, wherein the global network status information is a single signal which may be in one of four states to indicate a global network status.

10. The integrator of claim 1, wherein the data handler comprises a cross matrix network selectively providing routes for the data and timing information.

11. The integrator of claim 1, wherein the data is clocked with the timing information.

12. The integrator of claim 11, wherein the data may be transmitted asynchronously to the plurality of repeater units.

13. The integrator of claim 1, wherein the plurality of repeater units comprises monolithic integrated circuit repeater units.

14. The integrator of claim 1, wherein the plurality of repeater units perform IEEE 802.3 Standard machine state functions.

15. A method for coordinating a plurality of repeater units to operate as a single repeater unit, the method comprising the steps of:

a. receiving a repeater unit status signal from each of the plurality of repeater units;

b. in response to the repeater unit status signal, generating a broadcast network carrier signal;

c. transmitting the broadcast network carrier signal to the plurality of repeater units;

d. receiving a first transmission from one of the plurality of repeater units;

e. repeating the first transmission to other of the plurality of repeater units;

f. detecting a collision if a second transmission is received during one of receipt of the first transmission and repeat of the first transmission; and

g. discarding the first and second transmissions when a collision is detected.

16. The method of claim 15, wherein the step of receiving the repeater unit status signal further includes receiving one of:

a. a ready state signal indicating the repeater unit is ready to receive a transmission;

b. a receive state signal indicating the repeater unit is receiving a transmission;

c. a receive collision state signal indicating the repeater unit is detecting a receive collision; and

d. a transmit collision state signal indicating the repeater unit is detecting a transmit collision.

17. The method of claim 15, wherein the step of generating a broadcast network carrier signal further comprises the steps of:

a. generating a first signal if a ready state signal is received from each repeater unit;

b. generating a second signal if a receive state signal is received from one repeater unit and no receiver collision state signal and no transmit collision state signal is received;

c. generating a third signal if at least one transmit collision state signal is received; and

d. generating a fourth signal of one receive transmit collision state signal is received and no transmit collision state signal is received.