Method and apparatus for connection handoff between connected radios

• US 6,298,053 B1
• Filed: 01/14/2000
• Issued: 10/02/2001
• Est. Priority Date: 01/14/2000
• Status: Expired due to Term

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Metricom, Inc.
• Inventors: Paulsen, David Lynn, Flammer, III, George H.
• Primary Examiner(s): Olms, Douglas
• Assistant Examiner(s): Sam, Phirin
• Application Number:
  US09/483,304
• Time in Patent Office: 627 Days
• Field of Search: 370/349, 370/277, 370/280, 370/294, 370/310, 370/327, 370/328, 370/329, 370/331, 370/330, 370/334, 370/336, 370/337, 370/338, 370/339, 370/340, 370/341, 370/345, 370/347, 370/353, 370/356, 370/360, 370/396, 370/400, 370/401, 370/404, 370/406, 370/442, 370/445, 370/449, 375/130, 375/132, 375/138, 455/436, 455/439, 455/448
• US Class Current: 370/349
• CPC Class Codes: H04W 74/06 using polling

Abstract

In a radio based wireless mesh packet network wherein packet traffic is scheduled between a high capacity communications link and a plurality of nodes interconnected by wireless links, an access unit is provided at a first node having a plurality of radios coupled to the high capacity link and wherein each of the plurality of radios is capable of detecting a polling of the access unit by other nodes. A poll is sent from a second node to the access unit at the first node on a first channel. Reports of receipt of the poll are shared among the plurality of radios. An acknowledgment is sent on behalf of the access unit from only one of the plurality of radios to the polling node, and further communication is conducted between the one of the plurality of radios and the node on a second channel.

Claims

1. A method in a radio based wireless mesh packet network for optimizing packet traffic scheduling between a high capacity communications link and a plurality of nodes interconnected by wireless links, the method comprising:

providing at a first node an access unit having a plurality of radios coupled to said high capacity link wherein each of said plurality of radios is capable of detecting a polling of said first node;

sending a poll from a second node to said first node on a first channel;

sharing among said plurality of radios reports of receipt of said poll;

sending an acknowledgment on behalf of said first node from only one of said plurality of radios to said second node; and

conducting further communication between said one of said plurality of radios and said second node on a second channel.

2. The method according to claim 1 wherein said plurality of radios are co-located and are interconnected by a private link.

3. The method according to claim 2 wherein said first channel is a first frequency hop sequence.

4. The method according to claim 1 wherein said sharing step includes sending said reports to a controller.

5. The method according to claim 4 wherein said one of said plurality of radios is chosen by said controller.

6. The method according to claim 5 wherein said plurality of radios are co-located and are interconnected by a private link.

7. The method according to claim 6 wherein said first channel is a first frequency hop sequence.

8. An apparatus in a radio based wireless mesh network for optimizing packet traffic scheduling between a high capacity communications link and a plurality of nodes, the apparatus comprising:

a plurality of radios at a first node coupled to said high capacity link wherein each of said plurality of radios is capable of detecting a polling of said apparatus by a second node on a first channel; and

a controller connected to each of said plurality of radios allowing only one of said plurality of radios to respond to said polling by said second node, and causing said responding radio to communicate with said second node on a second channel.

9. The apparatus as in claim 8 wherein said first channel is a first frequency hop sequence.

10. The apparatus as in claim 9 wherein said plurality of radios are interconnected via a private communication link.

11. The apparatus as in claim 8 wherein said controller is distributed among said plurality of radios.

12. The apparatus as in claim 11 wherein said first channel is a first frequency hop sequence.

13. The apparatus as in claim 12 wherein said controller is distributed among said plurality of radios.