Pulse or digital communications – Spread spectrum
Reexamination Certificate
2008-08-08
2011-11-08
Wang, Ted (Department: 2611)
Pulse or digital communications
Spread spectrum
C375S132000, C375S354000, C375S355000, C375S356000
Reexamination Certificate
active
08054864
ABSTRACT:
A method of synchronizing wireless devices includes establishing a recurring sequence of frequency channels at which the wireless devices are to communicate. The frequency channels are divided into a plurality of groups. Synchronization information is transmitted at a respective first frequency channel in each of the groups of frequency channels during a first sampling time period. One of the groups of frequency channels is selected. A wireless device is used to sample each of the frequency channels in the selected group during the first sampling time period. Non-synchronization information is transmitted after the first sampling time period. Synchronization information is transmitted at a next respective frequency channel in each of the groups of frequency channels during a next sampling time period. The next sampling time period occurs after the transmitting of the non-synchronization information.
REFERENCES:
patent: 7280615 (2007-10-01), Roberts
patent: 7778151 (2010-08-01), Bertrand et al.
patent: 2002/0080769 (2002-06-01), Spencer et al.
patent: WO02099993 (2002-12-01), None
Gang Lu et al: “Performance Evaluation of the IEEE 802.15.4 MAC for Low-Rate Low-Power Wireless Networks”; Performance, Computing, and Communications; 2004 IEEE International Conference on Phoenix, AZ, Apr. 15-17, 2004, Piscataway, NJ, USA, IEEE, Apr. 15, 2004, pp. 701-706 (5 pgs.); XP010770132, ISBN: 978-0-7803-8396-8. (The whole document).
FCC Regulations for ISM Band Devices: 902-928 MHz.
European Standard ETSI EN 300 220-1.
Keshavarzian Abtin
Manjeshwar Arati
Robert & Bosch GmbH
Taft Stettinius & Hollister LLP
Wang Ted
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