METHOD AND DEVICE FOR PROVIDING A BRIDGE IN A NETWORK

• US 20090059934A1
• Filed: 08/30/2007
• Published: 03/05/2009
• Est. Priority Date: 08/30/2007
• Status: Abandoned Application

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Ramachandran, Shyamal, Gossain, Hrishikesh, Aggarwal, Pankaj
• Application Number:
  US11/847,466
• Publication Number:
  US 20090059934A1
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04L 12/462 LAN interconnection over a bridge based backbone
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks
• CPC Class Codes: H04W 88/16 Gateway arrangements
• CPC Class Codes: H04W 92/045 between access point and backbone network device

Abstract

A method and device for providing a bridge between a distribution system and a wireless network device as provided increases network availability. According to one aspect, the method includes assigning a first wireless network device to a first wireless distribution system port in response to processing a first identification message received from the first wireless network device. A second wireless network device is then assigned to a second wireless distribution system port in response to processing a second identification message received from the second wireless network device after assigning the first wireless network device to the first wireless distribution system port. The bridge is then provided between the distribution system and the first wireless network device via the first wireless distribution system port.

Claims

1. A method for providing a bridge between a distribution system and a first wireless network device, the method comprising:

assigning the first wireless network device to a first wireless distribution system port in response to processing a first identification message received from the first wireless network device;

assigning a second wireless network device to a second wireless distribution system port in response to processing a second identification message received from the second wireless network device after assigning the first wireless network device to the first wireless distribution system port; and

providing the bridge between the distribution system and the first wireless network device via the first wireless distribution system port.

2. The method of claim 1, wherein providing the bridge between the distribution system and the first wireless network device via the first wireless distribution system port comprises:

processing a first unicast packet received via the distribution system after assigning the second wireless network device to the second wireless distribution system port; and

forwarding the first unicast packet to the first wireless distribution system port.

3. The method of claim 2, further comprising:

processing a second unicast packet received via the first wireless distribution system port after assigning the second wireless network device to the second wireless distribution system port; and

forwarding the second unicast packet to the distribution system.

4. The method of claim 1, further comprising:

processing a loop detection packet received via the second wireless distribution system port from the second wireless network device;

detecting a loop path in the second wireless distribution system port in response to processing the loop detection packet; and

closing the second wireless distribution system port in response to detecting the loop path in the second wireless distribution system port.

5. The method of claim 1, further comprising:

processing a broadcast packet received via the distribution system after assigning the second wireless network device to the second wireless distribution system port;

selecting a preferred wireless distribution system port from a plurality of open wireless distribution system ports to forward the broadcast packet, wherein the plurality of open wireless distribution system ports comprises the first and second wireless distribution system ports; and

encapsulating the broadcast packet in a unicast packet.

6. The method of claim 5, wherein each encapsulated broadcast packet is multicast to network devices corresponding to open WDS ports.

7. The method of claim 5, wherein each encapsulated broadcast packet is unicast to network devices corresponding to open WDS ports.

8. The method of claim 5, wherein the preferred wireless distribution system port is selected from the plurality of open wireless distribution system ports.

9. The method of claim 1, wherein the bridge is provided by an Institute of Electrical and Electronics Engineers (IEEE) 802.1d type bridging system.

10. The method of claim 2, wherein the loop detection packet is an Institute of Electrical and Electronics Engineers (IEEE) 802.1d Bridge Protocol Data Unit (BPDU).

11. The method of claim 1, wherein the first wireless distribution system port and the second wireless distribution system port are logical wireless distribution system ports.

12. The method of claim 1, wherein the first wireless distribution system port and the second wireless distribution system port are backhaul wireless link ports.

13. The method of claim 1, wherein the first wireless network device and the second wireless network device are mesh access points.

14. The method of claim 4, wherein the loop path in the second wireless distribution system port is detected using a spanning tree algorithm.

15. The method of claim 1, wherein the bridge is provided by a mesh access point.

16. The method of claim 1, wherein the bridge is provided by an intelligent access point (IAP).

17. The method of claim 1, wherein the first identification message and the second identification message are layer-2 routing hello messages from a wireless mesh network device.

18. The method of claim 1, wherein the first identification message and the second identification message are neighbor discovery packet or beacons

19. The method of claim 4, wherein the second wireless distribution system port is re-opened after no additional loop detection packets are received during a predefined time period.

20. A device for providing a bridge between a distribution system and a first wireless network device, comprising:

means for assigning the first wireless network device to a first wireless distribution system port in response to processing a first identification message received from the first wireless network device;

means for assigning a second wireless network device to a second wireless distribution system port in response to processing a second identification message received from the second wireless network device after assigning the first wireless network device to the first wireless distribution system port; and

means for providing the bridge between the distribution system and the first wireless network device via the first wireless distribution system port.