Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2004-10-14
2008-11-18
Urban, Edward (Department: 2618)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S491000, C370S330000, C370S331000
Reexamination Certificate
active
07453912
ABSTRACT:
Carrier frequency selection and handoff initiation methods in wireless communications systems employing multiple carrier frequencies are described. Although the receiver is tuned to a single band, based on the relative energy of one or more beacon signal components corresponding to the currently used carrier and one or more beacon signal components corresponding to an alternative carrier, a carrier selection and a handoff determination is made. Mobile nodes can use a single RF chain with a controllable RF filter to receive and process a signal within a first selected carrier band including components from different transmitters, e.g., a first signal component identified with the first currently selected band and a second signal component identified with a second alternative band. The signal components, e.g., beacon signal components from different transmitters may be obtained from a signal which corresponds to multiple symbol transmission time periods. Separate signal energy measurements are performed on the first and second signal components. The signal component energy is compared, and a determination is made as to whether a handoff should be initiated.
REFERENCES:
patent: 5507010 (1996-04-01), Ahonen
patent: 5896562 (1999-04-01), Heinonen
patent: 5915212 (1999-06-01), Pzelomiec
patent: 6216012 (2001-04-01), Jensen
patent: 6272313 (2001-08-01), Arsenault et al.
patent: 6292508 (2001-09-01), Hong et al.
patent: 6347234 (2002-02-01), Scherzer
patent: 2002/0037742 (2002-03-01), Enderlein et al.
patent: 2002/0094785 (2002-07-01), Deats
patent: 2004/0203567 (2004-10-01), Berger
patent: 2005/0085265 (2005-04-01), Laroia et al.
patent: 2005/0124345 (2005-06-01), Laroia et al.
International Search and The Written Opinion of the International Searching Authority for PCT/US2004/34226. dated Oct. 4, 2005, pp. 8.
Lane Frank A.
Laroia Rajiv
Li Junyi
Hannon Christian A
Jacobs Jeffrey D.
QUALCOMM Incorporated
Rouse Thomas R.
Urban Edward
LandOfFree
Methods and apparatus for selecting between multiple... 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 selecting between multiple..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for selecting between multiple... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4021629