System and method for adaptive network technique using isochronous transmission

• US 8,774,072 B2
• Filed: 03/02/2007
• Issued: 07/08/2014
• 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): Blanton, John
• Assistant Examiner(s): TRAN, THINH D
• Application Number:
  US11/681,692
• Publication Number:
  US 20070206510A1
• Time in Patent Office: 2,685 Days
• Field of Search: None
• US Class Current: 370/311
• 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 method of transmitting network communications, the method comprising:

wirelessly transmitting a first repeating isochronous signal;

receiving a signal, wherein the received signal is a second repeating isochronous signal and the transmitted and received isochronous signals are each a data message signal;

identifying a transmission characteristic of the second repeating isochronous signal;

variably adjusting the isochronous phase of the first repeating isochronous signal based on a transmission characteristic of the received signal;

defining an activation window based on the identified transmission characteristic;

receiving the second repeating isochronous signal during the activation window; and

adjusting the activation window by detecting changes in the identified transmission characteristic of the second repeating isochronous signal.

2. The method of claim 1, wherein the transmission characteristic is selected from the group consisting of isochronous frequency, isochronous phase, power, amplitude, duration, modulation, and combinations thereof.

3. The method of claim 1, further including adjusting the isochronous frequency of the first repeating isochronous signal.

4. The method of claim 1, wherein the isochronous phase of the first repeating isochronous signal is randomly adjusted.

5. The method of claim 1, wherein the isochronous phase of the first repeating isochronous signal is adjusted over a plurality of transmissions.

6. A wireless network node, comprising:

a transceiver configured to wirelessly transmit a first repeating isochronous signal and receive a second repeating isochronous signal, wherein the transmitted and received isochronous signals are each a data message signal; and

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

estimate an isochronous frequency or phase of the second repeating isochronous signal,

define an activation window based on the estimated isochronous frequency or phase of the second repeating isochronous signal,

control the transceiver to receive the second repeating isochronous signal during the activation window,

adjust the activation window by detecting changes in the isochronous frequency or phase of the second repeating isochronous signal, and

adjust the isochronous frequency or phase of the first repeating isochronous signal based on the estimated isochronous frequency or phase of the second repeating isochronous signal.

7. The node of claim 6, wherein the processing system is configured to limit interference with the second repeating isochronous signal by adjusting the isochronous frequency of the first repeating isochronous signal.

8. The node of claim 6, wherein the processing system is configured to adjust the isochronous frequency of the first repeating isochronous signal over a plurality of transceiver transmissions.

9. A wireless network, comprising:

a first wireless network node including—

a transceiver configured to wirelessly transmit a first repeating isochronous signal and receive a signal, wherein the received signal is a second repeating isochronous signal and the transmitted and received isochronous signals are each a data message signal; and

a first processing system coupled with the transceiver, the first processing system configured to variably adjust the isochronous phase of the first repeating isochronous signal based on a transmission characteristic of the received second repeating isochronous signal; and

a second wireless network node including—

a receiver configured to wirelessly receive the first repeating isochronous signal, and

a second processing system coupled with the receiver, the second processing system configured to—

identify a transmission characteristic of the first repeating isochronous signal,

define an activation window based on the identified transmission characteristic,

control the receiver to receive the first repeating isochronous signal during the activation window, and

adjust the activation window by detecting changes in the identified transmission characteristic of the first repeating isochronous signal.

10. The network of claim 9, wherein the second processing system is configured to activate the receiver at the beginning of the activation window and deactivate the receiver at the end of the activation window.

11. The network of claim 9, wherein the transmission characteristic of the first repeating isochronous signal is selected from the group consisting of isochronous frequency, isochronous phase, power, amplitude, duration, modulation, and combinations thereof.

12. The network of claim 9, wherein the transceiver is configured to transmit the first repeating isochronous signal during a transmission window and receive the received signal only during a guard window, the guard window being in proximity in time to the transmission window.

13. The network of claim 9, wherein the receiver includes a transmitter configured to transmit signals for reception by the transceiver of the first wireless network node.

14. The network of claim 13, wherein the second network node transmits the second repeating isochronous signal.