| US 7,580,389 B2 | ||
| Medium hopping data transmitter | ||
| Geoffrey Kirk, Redwood City, Calif. (US); James M. Janky, Los Altos, Calif. (US); and Arthur E. Anderson, Sunnyvale, Calif. (US) | ||
| Assigned to Trimble Navigation Limited, Sunnyvale, Calif. (US) | ||
| Filed on Aug. 03, 2006, as Appl. No. 11/499,326. | ||
| Prior Publication US 2006/0268778 A1, Nov. 30, 2006 | ||
| Int. Cl. H04Q 7/00 (2006.01) | ||
| U.S. Cl. 370—329 [370/341] | 21 Claims |
| 1. A medium hopping radio transmission method comprising:
a) checking for radio transmissions on a first radio channel from a predetermined set of radio channels, said predetermined
set of radio channels based upon a set of channel preference factors;
b) transmitting a message on said first radio channel if said first radio channel is unoccupied;
c) checking for radio transmissions on a second radio channel from said predetermined set of channels if said first radio
channel is occupied; and
d) transmitting said message on said second radio channel if said second radio channel is unoccupied and said message was
not sent on said first radio channel.
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