System and method for adaptive network technique using isochronous transmission

• US 9,282,520 B2
• Filed: 06/16/2014
• Issued: 03/08/2016
• Est. Priority Date: 03/03/2006
• Status: Active Grant

• Current Assignee: Garmin Switzerland GmbH (Garmin Limited)
• Original Assignee: Garmin Switzerland GmbH (Garmin Limited)
• Inventors: Morris, Rodney D., Rooney, James K., Fung, Jeffrey Y. K.
• Primary Examiner(s): Crutchfield, Christopher
• Assistant Examiner(s): TRAN, THINH D
• Application Number:
  US14/305,540
• Publication Number:
  US 20140293972A1
• Time in Patent Office: 631 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 12/40058 Isochronous transmission
• CPC Class Codes: H04W 52/028 switching on or off only a part of the equipment circuit blocks
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A network including a plurality of nodes each configured as transmitters, receivers, or transceivers. At least one of the nodes may be configured to wirelessly transmit a repeating isochronous signal for reception by one or more of the other nodes. The isochronous phase and/or frequency of the repeating isochronous transmission may be variably adjusted to reduce signal interference.

Claims

1. A wireless network node comprising:

a transceiver configured to wirelessly receive a first repeating isochronous signal having an isochronous transmission period and a second repeating isochronous signal having an isochronous transmission period; and

a processing system coupled with the transceiver, the processing system configured to

determine the isochronous transmission period of the first repeating isochronous signal based on a timing of the received first repeating isochronous signal, the first repeating isochronous signal forming an established isochronous communication channel;

selectively activate and deactivate the transceiver based on the determined isochronous transmission period of the first repeating isochronous signal to generate a duty cycle including one or more search windows, the one or more search windows spaced in time such as to not interfere with the reception of the first repeating isochronous signal; and

identify the second repeating isochronous signal received by the transceiver during at least one search window;

wherein the one or more search windows are spaced according to the determined isochronous transmission period of the first repeating isochronous signal.

2. The node of claim 1, wherein the processing system is further configured to selectively activate and deactivate the transceiver at regular periods to attempt to receive the second repeating isochronous signal in a search window.

3. The node of claim 1, wherein the processing system is further configured to selectively activate and deactivate the transceiver at irregular periods to attempt to receive the second repeating isochronous signal in a search window.

4. The node of claim 1, wherein the processing system is further configured to

determine the isochronous transmission period of the identified second repeating isochronous signal based on a timing of the received second repeating isochronous signal, and

selectively activate and deactivate the transceiver based on the determined isochronous transmission period of the second repeating isochronous signal to form a second established isochronous communication channel,

the processing system configured to generate the duty cycle based on the determined isochronous transmission periods of the first repeating isochronous signal and the second repeating isochronous signal.

5. The node of claim 1, wherein the one or more search windows are periods when the first repeating isochronous signal is not being received by the transceiver.

6. The node of claim 1, wherein the processing system is configured to determine the isochronous transmission period of the first repeating isochronous signal by determining a difference between times at which the first repeating isochronous signal is received by the transceiver.

7. The node of claim 1, wherein the processing system is configured to determine the isochronous transmission period of the first repeating isochronous signal by processing only a portion of the received first repeating isochronous signal.

8. The node of claim 1, wherein the second repeating isochronous signal indicates that the network node transmitting the second repeating isochronous signal is in a discovery state.

9. The node of claim 1, wherein the processing system is further configured to identify a variance of the transmission period of the received first repeating isochronous signal and activate and deactivate the transceiver to continue receiving the first repeating isochronous signal and spacing the one or more search windows in time such as to not interfere with the reception of the first repeating isochronous signal.

10. A method of searching for a transmitted isochronous signal, the method comprising:

wirelessly receiving, using a transceiver, a first repeating isochronous signal having an isochronous transmission period and a second repeating isochronous signal having an isochronous transmission period;

determining, using a processing system coupled with the transceiver, the isochronous transmission period of the first repeating isochronous signal based on a timing of the received first repeating isochronous signal, the first repeating isochronous signal forming an established isochronous communication channel;

selectively activating and deactivating the transceiver, using the processing system, based on the determined isochronous transmission period of the first repeating isochronous signal, to generate a duty cycle including one or more search windows, the one or more search windows spaced according to the determined isochronous transmission period of the first repeating isochronous signal such as to not interfere with the reception of the first repeating isochronous signal by the transceiver; and

identifying the second repeating isochronous signal received by the transceiver during at least one search window.

11. The method of claim 10, further including selectively activating and deactivating the transceiver at regular periods to attempt to receive the second repeating isochronous signal in a search window.

12. The method of claim 10, wherein the duty cycle is generated based on the determined isochronous transmission periods of the first repeating isochronous signal and the second repeating isochronous signal in a search window.

13. The method of claim 10, further including determining, using the processing system, the isochronous transmission period of the first repeating isochronous signal by determining a difference between times at which the first repeating isochronous signal is received by the transceiver.

14. The method of claim 10, wherein the processing system is further configured to determine the isochronous transmission period of the first repeating isochronous by processing only a portion of the received first repeating isochronous signal.

15. The method of claim 10, wherein the second repeating isochronous signal indicates that the network node transmitting the second repeating isochronous signal is in a discovery state.

16. The method of claim 10, further including identifying, using the processing system, a variance of the transmission period of the received first repeating isochronous signal and activating and deactivating the transceiver to continue receiving the first repeating isochronous signal and spacing the one or more search windows in time such as to not interfere with the reception of the first repeating isochronous signal.

17. A wireless network comprising;

a first wireless network node configured to transmit a first repeating isochronous signal having an isochronous transmission period;

a third wireless network node configured to transmit a second repeating isochronous signal having an isochronous transmission period; and

a second wireless network node including;

a transceiver configured to wirelessly receive the first repeating isochronous signal and the second repeating isochronous signal; and

a processing system coupled with the transceiver, the processing system configured to

determine the isochronous transmission period of the first repeating isochronous signal based on a timing of the received first repeating isochronous signal, the first repeating isochronous signal forming an established isochronous communication channel;

selectively activate and deactivate the transceiver based on the determined isochronous transmission period of the first repeating isochronous signal to generate a duty cycle including one or more search windows, the one or more search windows spaced in time such as to not interfere with the reception of the first repeating isochronous signal; and

identify the second repeating isochronous signal received by the transceiver from the third wireless network node during at least one search window;

wherein the one or more search windows are spaced according to the determined isochronous transmission period of the first repeating isochronous signal.

18. The network of claim 17, wherein the processing system of the second wireless network node is further configured to determine the isochronous transmission period of the first repeating isochronous signal by determining a difference between times at which the first repeating isochronous signal is received by the transceiver of the second wireless network node.

19. The network of claim 17, wherein the processing system of the second wireless network node is further configured to selectively activate and deactivate the transceiver at regular periods to attempt to receive the second repeating isochronous signal in a search window.

20. The network of claim 17, wherein the processing system of the second wireless network node is configured to

determine the isochronous transmission period of the identified second repeating isochronous signal based on a timing of the second repeating isochronous signal, and

selectively activate and deactivate the transceiver based on the determined isochronous transmission period of the second repeating isochronous signal to form a second established isochronous communication channel,

the processing system configured to generate the duty cycle based on the determined isochronous transmission periods of the first repeating isochronous signal and the second repeating isochronous signal.

21. The network of claim 17, wherein the processing system of the second wireless network node is configured to determine the isochronous transmission period of the first repeating isochronous by processing only a portion of the received first repeating isochronous signal.

22. The network of claim 17, wherein the one or more search windows are periods when the first repeating isochronous signal is not being received by the transceiver of the second wireless network node.

23. The network of claim 17, wherein the second repeating isochronous signal indicates that the third wireless network node is in a discovery state.

24. The network of claim 17, wherein the processing system of the second wireless network node is further configured to identify a variance of the transmission period of the received first repeating isochronous signal and activate and deactivate the transceiver to continue receiving the first repeating isochronous signal and spacing the one or more search windows in time such as to not interfere with the reception of the first repeating isochronous signal.