Multi-speed mesh networks

• US 8,509,790 B2
• Filed: 06/22/2006
• Issued: 08/13/2013
• Est. Priority Date: 01/31/2006
• Status: Active Grant

• Current Assignee: Silicon Laboratories Incorporated
• Original Assignee: Zensys A/S (Sigma Designs Incorporated)
• Inventors: Christensen, Tommas Jess, Midtgaard, Jacob, Clement, Didier, Nielsen, John, Olesen, Morten Vested, Paulsen, Olfert Paul, Jensen, Rasmus Glarborg
• Primary Examiner(s): Kincaid, Lester
• Assistant Examiner(s): Jama, Isaak R
• Application Number:
  US11/425,917
• Publication Number:
  US 20070177538A1
• Time in Patent Office: 2,609 Days
• Field of Search: 370/230, 370/235, 370/406
• US Class Current: 455/450
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 63/0853 using an additional device, e.g. smartcard, SIM or a different communication terminal cryptographic mechanisms or cryptographic arrangements for entity authentication involving additional secure or trusted devices H04L9/3234
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

In embodiments of the present invention improved capabilities are described for a communications facility that is adapted to communicate with at least one other mesh network node at a communication speed selected from a plurality of communication speeds.

Claims

1. A method comprising:

providing a communications facility adapted to communicate with a destination mesh network node via a wireless mesh network that includes a plurality of nodes, the plurality of nodes further including a first plurality of single speed nodes and a second plurality of multi-speed nodes, each one of the first plurality of single speed nodes operating at a low data rate and each one of the second plurality of multi-speed nodes operating at the low data rate and a high data rate, each of multi-speed nodes further including multiple parallel receive demodulators to receive, without prior negotiation, a signal at either of the low data rate at a first frequency or the high data rate at a second frequency, wherein the communications facility is capable of transmitting data at a communication speed selected from a plurality of communication speeds that includes the low data rate and the high data rate, and wherein the plurality of communication speeds operate on the same communications channel and wherein at least one communications channel has multi-speed capabilities across a plurality of frequencies;

in response to receiving data intended for the destination mesh network node,

causing the communications facility to select a communication route to the destination

mesh network node, wherein;

(i) the destination mesh network node is linked to a device and has a preferred transmission speed corresponding to the low data rate, wherein the destination mesh network node includes a power-on-reset circuit which is active even in a sleep mode;

(ii) an intermediate node in the communication route that communicates directly with the destination mesh network node and is a multi-speed node adapted to transmit at either the low data rate or the high data rate; and

transmitting the data to the destination mesh network node through the communication route at the low data rate.

2. The method of claim 1 further comprising transferring control of a receiver of one of the multi-speed nodes to a first one of the multiple parallel receive demodulators of the receiver to detect a valid signal.

3. The method of claim 1 wherein the communications channel operates through at least one wireless frequency.

4. The method of claim 1 wherein selecting a data rate includes selecting the data rate based on a criterion.

5. The method of claim 4, wherein the criterion comprises a desired communication speed.

6. The method of claim 5, wherein the desired communication speed is a maximum communication speed.

7. The method of claim 5, wherein the desired communication speed is a minimum communication speed.

8. The method of claim 4, wherein the criterion comprises a desired communication bandwidth.

9. The method of claim 8, wherein the desired communication bandwidth is maximized.

10. The method of claim 4, wherein the criterion comprises a desired communication path.

11. The method of claim 1, wherein selecting the data rate includes manually selecting the data rate.

12. The method of claim 11, wherein manually selecting the data rate includes manually selecting a rate for the mesh network node.

13. The method of claim 1, wherein selecting the data rate includes automatically selecting the data rate.

14. The method of claim 13, wherein automatically selecting the data rate includes an audit process, wherein the audit process involves determining at least one acceptable communication speed associated with the second network node.

15. The method of claim 1 further comprising:

selecting a first data rate for communication between the mesh network node and one of the plurality of nodes; and

storing information relating to the first data rate for communication between the mesh network node and one of the plurality of nodes in a data structure at the mesh network node, thereby providing a stored data rate.

16. The method of claim 15, wherein the stored data rate is selected from a plurality of data rates including the low data rate and the high data rate.

17. The method of claim 15, wherein the stored data rate is referred to prior to communicating with the one of the plurality of nodes.

18. The method of claim 15 further comprising selecting a second data rate for the one of the plurality of nodes, wherein the second data rate is selected based on information relating to another one of the plurality of nodes within the wireless mesh network.

19. The method of claim 18 further comprising storing information relating to the second data rate in the data structure.