Telecommunications – Transmitter and receiver at separate stations – Distortion – noise – or other interference prevention,...
Reexamination Certificate
2004-02-26
2009-12-15
Maung, Nay A. (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Distortion, noise, or other interference prevention,...
C455S041200, C455S513000, C370S321000, C370S329000, C375S132000, C375S135000, C375S136000
Reexamination Certificate
active
07634231
ABSTRACT:
A system for allowing BT, WDCT, and 802.11 transceivers to operate in close proximity with a minimum of interference, is disclosed. In an exemplary embodiment, a method for avoiding interference between a first FHSS device and other RF devices using 802.11 or FHSS protocols is disclosed. The first FHSS device initially detects the presence of an interfering RF device (“interferer”), for example a device employing 802.11 protocol, and adjusts the frequency of channels used for operation of the first device accordingly to avoid overlap with the 802.11 band. In the presence of an additional interferer, for example, a second FHSS device emitting an interfering signal, the first FHSS device may segregate its operation channels to achieve maximum frequency separation from an 802.11 and second FHSS device. In addition, the first and third devices may also multiplex their transmit/receive timing to avoid interference in time domain. By avoiding interference in time domain, first and third device can occupy the same channels in the frequency band achieving further frequency separation from the 802.11 device.
REFERENCES:
patent: 5809059 (1998-09-01), Souissi et al.
patent: 6275518 (2001-08-01), Takahashi et al.
patent: 6941110 (2005-09-01), Kloper et al.
patent: 2001/0022806 (2001-09-01), Adachi
patent: 2002/0071402 (2002-06-01), Kockmann et al.
patent: 2003/0153338 (2003-08-01), Herz et al.
patent: 2004/0047324 (2004-03-01), Diener
patent: 2004/0132500 (2004-07-01), Rogalski et al.
patent: 2006/0176850 (2006-08-01), Gan et al.
patent: WO 02/25832 (2002-03-01), None
patent: WO 2003/090037 (2003-10-01), None
Kerry et al. (“Amendment to IEEE 802.11a avoids interference with other 5Ghz-Band devices” pp. 1-2; retrieve on Aug. 7, 2005; retrieved from the internet < URL: http://standards.leee.org/announcements/pr—80211hwlan.html>).
GB Search Report dated -Jul. 13, 2005.
Kerry et al.; “Amendment to IEEE 802.11a Avoids Interference With Other 5 GHz-Band Devices”; [online], p. 1-2; [retrieved on Aug. 7, 2005]; retrieved from the Internet < URL: http://standards.ieee.org/announcements/pr—80211hwlan.html>.
Maung Nay A.
Nguyen Tuan H
Paul Hastings Janofsky & Walker LLP
Vtech Telecommunications Limited
LandOfFree
System and method for enhanced interoperability between a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for enhanced interoperability between a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for enhanced interoperability between a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4098622