Medium hopping data transmitter

Details Medium hopping data transmitter Medium hopping data transmitter

2006-08-03

2009-08-25

Pham, Chi H. (Department: 2416)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S341000

Reexamination Certificate

active

07580389

ABSTRACT:
A first communication device (e.g., the communication device that is sending data) monitors a radio channel in a predetermined set of radio channels. A message is transmitted on the first radio channel if the first radio channel is unoccupied. A second radio channel from the predetermined set of channels is checked if the first radio channel is occupied. The message is sent on the second radio channel if the second radio channel is unoccupied and the message was not sent on the first radio channel. In one embodiment, the transmission is sent in predetermined limited time blocks and predetermined set of channels is limited to a particular number of channels. In one embodiment a channel occupancy map and channel selection algorithm are utilized to establish the predetermined set of channels.

REFERENCES:
patent: 5079768 (1992-01-01), Flammer
patent: 5471645 (1995-11-01), Felix
patent: 5729540 (1998-03-01), Wegrzyn
patent: 6512928 (2003-01-01), Janky et al.
patent: 6795410 (2004-09-01), Janky et al.

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