Auto-negotiation method for high speed link in gigabit Ethernet using 1000 Base-T standard and apparatus thereof

• US 7,054,947 B2
• Filed: 09/04/2001
• Issued: 05/30/2006
• Est. Priority Date: 01/15/2001
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yun, Yeou-sun
• Primary Examiner(s): Dharia, Rupal
• Assistant Examiner(s): BAYARD, DJENANE M
• Application Number:
  US09/945,605
• Publication Number:
  US 20020133631A1
• Time in Patent Office: 1,729 Days
• Field of Search: 709/251, 709/208, 709/233, 370/438, 370/463, 370/296, 370/348, 717/173, 375/348
• US Class Current: 709/233
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

An auto-negotiation (AN) method for establishing a high speed link between first and second transmitting devices in a gigabit Ethernet using the 1000 Base-t standard includes transmitting and receiving a base page indicating a transmission capability between the first and second transmitting devices. A message page is transmitted and received that indicates a 1000 Mbps transmission capability between the first and second transmitting devices and a specific state. A first unformatted page is transmitted and received that indicates transmitting speeds and modes, and port types of the first and second transmitting devices. A null page is transmitted and received after the first unformatted page, upon determining a master and slave from among the first and second transmitting devices based upon the first unformatted page. A high speed link is established between the first and second transmitting devices and the AN method is terminated.

Claims

1. An auto-negotiation (AN) method for establishing a high speed link between a first transmitting device and a second transmitting device, comprising the steps of:

(a) initializing a transmission state machine and a reception state machine of the first and the second transmitting devices;

(b) transmitting and receiving a base page that indicates a transmission capability between the first and the second transmitting devices;

(c) transmitting and receiving a message page that indicates a 1000 Mbps transmission capability between the first and the second transmitting devices and a specific state;

(d) transmitting and receiving a first unformatted page that indicates transmitting speeds, modes, and port types of the first and the second transmitting devices;

(e) determining whether a master and a slave can be determined from among the first and the second transmitting devices based upon the first unformatted page;

(f) transmitting and receiving a null page after the first unformatted page, when the master and the slave can be determined; and

(g) establishing the high speed link between the first and the second transmitting devices and ending the AN method, upon transmitting and receiving the null page,

wherein in the step (e), the master and the slave can be determined when the port types of the first and the second transmitting devices are different from each other.

2. The AN method of claim 1, wherein the step (c) comprises the steps of:

(c1) transmitting the message page that indicates the 1000 Mbps transmission capability and the specific state from one of the first and the second transmitting devices;

(c2) determining whether the message page that indicates the specific state is received from an other one of the first and the second transmitting devices; and

(c3) performing the steps (d) through (g) if a reception of the message page is determined.

3. The AN method of claim 1, further comprising the steps of:

(h) transmitting and receiving a second unformatted page after the first unformatted page via the first and the second transmitting devices, when the master and the slave cannot be determined in the step (e); and

(i) establishing a link and ending the AN method by transmitting and receiving the null page,

wherein the second unformatted page includes random seed values.

4. The AN method of claim 3, wherein the random seed values included in the second unformatted page of the first and the second transmitting devices are compared and whichever of the first and the second transmitting devices has a larger seed value is determined to be the master.

5. The AN method of claim 1, wherein the transmitting device receiving the message page that indicates the specific state identifies a page received after the first unformatted page as the null page.

6. An auto-negotiation (AN) method for establishing a high speed link between a first transmitting device and a second transmitting device, comprising the steps of:

(a) initializing a transmission state machine and a reception state machine of the first and the second transmitting devices;

(b) transmitting and receiving a base page that indicates a transmission capability between the first and the second transmitting devices;

(c) transmitting and receiving a message page that indicates a 1000 Mbps transmission capability between the first and the second transmitting devices and a specific state;

(d) transmitting and receiving a first unformatted page that indicates transmitting speeds, modes, and port types of the first and the second transmitting devices;

(e) determining whether a master and a slave can be determined from among the first and the second transmitting devices based upon the first unformatted page;

(f) transmitting and receiving a null page after the first unformatted page, when the master and the slave can be determined; and

(g) establishing the high speed link between the first and the second transmitting devices and ending the AN method, upon transmitting and receiving the null page,

wherein in the step (c), the message page that indicates the specific state includes a message that indicates an integer “

16”

.

7. An auto-negotiation (AN) apparatus for establishing a high speed link between a first transmitting device and a second transmitting device which transmit data, comprising:

an arbiter, disposed in each of the first and the second transmitting devices, for linking the first and the second transmitting devices using page information transmitted between the first and the second transmitting devices;

a state control unit having a transmission state machine and a reception state machine, the transmission state machine for controlling transmission states of page information transmitted via the arbiter for an AN function and the reception state machine for controlling a reception state of page information received from a transmitting device of a remote station, the state control unit for controlling a transmission and a receipt of a message page that indicates a specific state at a speed of 1000 Mbps;

a master/slave (M/S) determiner for determining a master and a slave from the page information transmitted between the first and the second transmitting devices; and

a register unit for storing the page information transmitted and received between the first and the second transmitting devices,

wherein the page information comprises at least one of the base page, the message page, the first unformatted page, the second unformatted page, and the null page,

wherein the transmission and reception state machines control the transmission and the receipt of the message page that indicates an integer “

16”

when transmitting data between the first and the second transmitting devices at the speed of 1000 Mbps.

8. The AN apparatus of claim 7, wherein the transmission and reception state machines control the transmission and the receipt of the first unformatted page and the null page after the message page.

9. The AN apparatus of claim 7, wherein the transmission and reception state machines control the sequential transmission and receipt of the first unformatted page, the second unformatted page, and the null page when the message page received from the first or the second transmitting device indicates a value other than “

16”

.

10. The AN apparatus of claim 7, wherein the first and the second transmitting devices are one of personal computers, hub switches, and backbone switches.

11. An auto-negotiation (AN) method for establishing a high speed link between a first transmitting device and a second transmitting device, comprising the steps of:

transmitting and receiving a base page that indicates a transmission capability between the first and the second transmitting devices;

transmitting and receiving a message page that indicates a pre-assigned transmission capability between the first and the second transmitting devices and a specific state;

transmitting and receiving a first unformatted page that indicates transmission related information for the first and the second transmitting devices;

transmitting and receiving a null page after the first unformatted page, upon determining that a master and a slave can be determined from among the first and the second transmitting devices based upon the first unformatted page; and

establishing the high speed link between the first and the second transmitting devices and ending the AN method, upon transmitting and receiving the null page,

wherein the master and the slave can be determined when the first and the second transmitting devices have different port types.

12. The AN method of claim 11, wherein the step of transmitting and receiving the message page comprises the steps of:

transmitting the message page from one of the first and the second transmitting devices;

determining whether the message page is received from an other one of the first and the second transmitting devices; and

performing the steps of transmitting and receiving the first unformatted page, transmitting and receiving the null page, and establishing the high speed link and ending the AN method, when the message page is determined to be received.

13. The AN method of claim 11, further comprising the steps of:

transmitting and receiving a second unformatted page after the first unformatted page via the first and the second transmitting devices when the master and the slave cannot be determined; and

establishing a link and ending the AN method by transmitting and receiving the null page,

wherein the second unformatted page includes random seed values.

14. The AN method of claim 13, wherein the random seed values included in the second unformatted page of the first and the second transmitting devices are compared and whichever of the first and the second transmitting devices has a larger seed value is determined to be the master.

15. The AN method of claim 11, further comprising the step of identifying a page received after the first unformatted page as the null page, by whichever of the first and the second transmitting devices that receives the message page.

16. The AN method of claim 11, wherein the pre-assigned transmission capability is about 1000 Mbps.

17. An auto-negotiation (AN) method for establishing a high speed link between a first transmitting device and a second transmitting device, comprising the steps of:

transmitting and receiving a base page that indicates a transmission capability between the first and the second transmitting devices;

transmitting and receiving a message page that indicates a pre-assigned transmission capability between the first and the second transmitting devices and a specific state;

transmitting and receiving a first unformatted page that indicates transmission related information for the first and the second transmitting devices;

transmitting and receiving a null page after the first unformatted page, upon determining that a master and a slave can be determined from among the first and the second transmitting devices based upon the first unformatted page; and

establishing the high speed link between the first and the second transmitting devices and ending the AN method, upon transmitting and receiving the null page,

wherein the specific state indicated in the message page is an integer “

16”

.