Network repeater

• US 7,808,985 B2
• Filed: 11/21/2006
• Issued: 10/05/2010
• Est. Priority Date: 11/21/2006
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Gigle Networks Incorporated (Broadcom, Inc.)
• Inventors: Romero, Veronica, Ruiz, David
• Primary Examiner(s): Shah; Chirag G
• Assistant Examiner(s): NGUYEN, MINH TRANG T
• Application Number:
  US11/562,380
• Publication Number:
  US 20080117896A1
• Time in Patent Office: 1,414 Days
• Field of Search: 370/212, 370/315, 370/401, 370/492, 370/501
• US Class Current: 370/389
• CPC Class Codes: H04B 3/58 Repeater circuits
• CPC Class Codes: H04L 12/46 Interconnection of networks

Abstract

A network repeater is configured to repeat data packets in a broadcast mode without generating a significant broadcast storm. The network repeater is configured to detect a characteristic of a received data packet. The data packet characteristic is compared with valid copies of packet characteristics previously stored in a packet registry. During a delay period, if a valid copy of the detected characteristic is found in the packet registry, then it is assumed that the packet is being received for the second time and the data packet is not repeated in the broadcast mode. If a valid copy of the detected characteristic of the data packet is not found in the packet registry, then the characteristic is stored in the packet registry and the data packet is repeated in a broadcast mode.

Claims

1. A method comprising:

receiving a data packet over a powerline;

detecting a characteristic of the received data packet;

searching a packet registry for a valid copy of the detected characteristic; and

if no valid copy of the detected characteristic is found in the packet registry, then

repeating the received data packet, and

storing the detected characteristic in the packet registry.

2. The method of claim 1, further including updating the packet registry by eliminating the valid copy from the packet registry using a registry manager.

3. The method of claim 2, wherein the registry manager is configured to eliminate the valid copy after a delayed time.

4. The method of claim 2, wherein the registry manager is configured to eliminate the valid copy in response to a detected network traffic.

5. The method of claim 1, further comprising dropping the data packet if the valid copy of the detected characteristic is found in the packet registry.

6. The method of claim 1, wherein the detected characteristic includes a source MAC address.

7. The method of claim 1, wherein the detected characteristic includes a checksum.

8. The method of claim 1, wherein the received data packet is repeated in a broadcast mode.

9. A repeater comprising:

an input/output configured to receive and transmit data packets over a powerline;

a packet registry configured to store a valid copy of a characteristic a preceding data packet;

a registry manager configured to maintain the valid copy of the characteristic the preceding data packet;

logic comprising hardware, firmware, or software stored on a non-transitory computer readable medium, logic configured;

to detect a characteristic of a received data packet,

to determine whether the valid copy of the characteristic of the preceding data packet stored in the packet registry matches the characteristic of the received data packet, and

to not repeat any received data packet for which the valid copy of the characteristic of the preceding data packets matches the characteristic of the received data packet; and

a circuit configured to execute the logic.

10. The repeater of claim 9, wherein the characteristic of the received packet includes a source MAC address.

11. The repeater of claim 9, wherein the characteristic of the received packet includes a checksum.

12. The repeater of claim 9, wherein the characteristic of the received packet includes a packet length.

13. The repeater of claim 9, wherein the characteristic of the received data packet comprises a tag added by the logic.

14. The repeater of claim 9, wherein the input/output is configured to receive the data packet according to an 802.3 standard.

15. The repeater of claim 9, wherein the registry manager is configured to measure a delay time.

16. The repeater of claim 15, wherein the delay time is less than a retry time.

17. The repeater of claim 15, wherein the delay time is responsive to packets received by the repeater.

18. The repeater of claim 9, wherein the registry manager is further configured to store a valid copy of the characteristic of the received data packet in the packet registry.

19. The repeater of claim 9, wherein the logic is further configured to detect a network storm and to drop the received data packet if the network storm is detected.

20. The repeater of claim 9, wherein the logic is further configured to maintain valid copies of the characteristics of each of a plurality of preceding data packets and to not repeat the received data packet if any of the valid copies of the characteristics matches the characteristic of the received data packet.

21. The repeater of claim 9, wherein the logic is further configured to broadcast the received data packet if the valid copy of the characteristic of the preceding data packet does matches the characteristic of the received data packet.