Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Reexamination Certificate
2007-07-31
2007-07-31
Issing, Gregory C. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
C342S465000
Reexamination Certificate
active
11347095
ABSTRACT:
The location of unmodified wireless assets in a wireless communication network may be identified using time differences of arrivals of a communication sequence at different network receivers. Time-stamping devices may include correlator circuits in parallel with signal decoders to time-stamp communication sequences. Cellular wireless networks may be frequency-multiplexed to increase spatial time-stamping density. Tags may be attached to passive assets to provide location identification information to network devices. Locations of assets broadcasting standard 802.11 radio frequency structures may be identified. Noise inherent in correlating a communication sequence may be reduced by using a selected correlation function.
REFERENCES:
patent: 3714573 (1973-01-01), Grossman
patent: 5119104 (1992-06-01), Heller
patent: 5126429 (1992-06-01), Kohler et al.
patent: 5365516 (1994-11-01), Jandrell
patent: 5512908 (1996-04-01), Herrick
patent: 5525081 (1996-06-01), Mardesich et al.
patent: 5526357 (1996-06-01), Jandrell
patent: 5596330 (1997-01-01), Yokev et al.
patent: 5764188 (1998-06-01), Ghosh et al.
patent: 5890068 (1999-03-01), Fattouche et al.
patent: 6121926 (2000-09-01), Belcher et al.
patent: 6127976 (2000-10-01), Boyd et al.
patent: 6150921 (2000-11-01), Werb et al.
patent: 6201499 (2001-03-01), Hawkes et al.
patent: 6268723 (2001-07-01), Hash et al.
patent: 6308428 (2001-10-01), Creighton, III
patent: 6317082 (2001-11-01), Bacon et al.
patent: 6330452 (2001-12-01), Fattouche et al.
patent: 6414634 (2002-07-01), Tekinay
patent: 6574244 (2003-06-01), Petrie et al.
patent: 0 748 084 (1996-02-01), None
patent: WO 98/10538 (1998-03-01), None
patent: WO 98/16849 (1998-04-01), None
patent: WO 99/67737 (1999-12-01), None
patent: WO 00/11590 (2000-03-01), None
patent: WO 00/14561 (2000-03-01), None
patent: WO 00/23956 (2000-04-01), None
patent: WO 00/46771 (2000-08-01), None
patent: WO 00/48016 (2000-08-01), None
patent: WO 00/52498 (2000-09-01), None
patent: WO 01/06401 (2001-01-01), None
patent: WO 01/07928 (2001-02-01), None
patent: WO 01/15070 (2001-03-01), None
patent: WO 01/29574 (2001-04-01), None
patent: WO 01/43419 (2001-06-01), None
patent: WO 01/50299 (2001-07-01), None
patent: WO 01/61465 (2001-08-01), None
patent: WO 01/61883 (2001-08-01), None
patent: WO 01/67043 (2001-09-01), None
patent: WO 01/67128 (2001-09-01), None
patent: WO 01/67341 (2001-09-01), None
patent: WO 01/74020 (2001-10-01), None
patent: WO 01/82520 (2001-11-01), None
patent: WO 01/82550 (2001-11-01), None
“IEEE Standard Part 11: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specification (ISO/IEC 8802-11, ANSI/IEEE STD 802.11-1999) Chapter 15: Direct Sequence Spread Spectrum (DSSS) PHY Specification for the 2.4 GHz Band . . . ” ISO/IEC 8802.11, Aug. 20, 1999 pp. 195-223 XP0022087977 pp. 223, Paragraph 15.4.8.4.
Li, Xinrong et al, “Comparison of Indoor Geolocation Methods in DSSS and OFDM Wireless LAN,” IEEE VTS-Fall VTC, Sep. 2000, pp. 3015-3020.
“IEEE Standard Part 11: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specification (ISO/IEC 8802-11, ANSI/IEEE STD 802.11-1999) Chapter 7: Frame Formats” ISO/IEC 8802-11, ANSI/IEEE STD 802.11 Aug. 20, 1999, pp. 34-58, XP002206839 pp. 42-43, Paragraph 7.2.1.4 Figure 19.
“IEEE Standard Part 11: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specification (ISO/IEC 8802-11, ANSI/IEEE STD 802.11-1999) Chapter 9: Mac Sublayer Functional Description”, ISO/IEC 8802-11, ANSI/IEEE STD 802.11, Aug. 20, 1999, pp. 70-97, XP0002207974 , p. 76, Paragraph 9.2.4.
Bekritsky Benjamin J.
Bridgelall Raj
Goren David P.
Kawaguchi Dean
Zegelin Chris
Baker & Botts LLP
Issing Gregory C.
Symbol Technologies Inc.
Tejwani Manu J.
LandOfFree
Methods and apparatus for identifying asset location in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for identifying asset location in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for identifying asset location in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3783321