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    Methods and apparatus for selecting between multiple carriers using a single receiver chain tuned to a single carrier
    2.
    发明专利
    Methods and apparatus for selecting between multiple carriers using a single receiver chain tuned to a single carrier 未知

    公开(公告)号：AU2009206173B2

    公开(公告)日：2010-12-09

    申请号：AU2009206173

    申请日：2009-08-05

    Applicant: QUALCOMM INC

    Inventor： LI JUNYI ,  LANE FRANK ,  LAROIA RAJIV

    IPC: H04B1/10 ,  H04B1/00 ,  H04B1/40 ,  H04B15/00 ,  H04B17/00 ,  H04B17/40

    Abstract: Receivers accommodating carrier frequency selection methods in wireless communications systems employing multiple carrier frequencies are described. Although the receiver is tuned to a single band, an estimate of the channel quality corresponding to the currently used carrier and an alternative carrier is generated without switching between carriers. Transmitters of different cells and/or different sectors primarily use different carrier frequencies but periodically transmit using a neighboring sector's carrier frequency. Mobile node receivers use a single RF chain with a controllable RF filter to receive and process a signal within a first selected carrier band including two components, a first signal component identified with the first currently selected band and a second signal component identified with a second alternative band.; Separate quality indicator values are obtained from the first and second signal components, compared, and a determination is made as to whether the receiver's RF filter should be switched to the second band.

    Methods and apparatus of improving inter-sector and/or inter-cell handoffs in a multi-carrier wireless communications system
    3.
    发明专利
    Methods and apparatus of improving inter-sector and/or inter-cell handoffs in a multi-carrier wireless communications system 未知

    公开(公告)号：AU2008203795A1

    公开(公告)日：2008-08-28

    申请号：AU2008203795

    申请日：2008-08-08

    Applicant: QUALCOMM INC

    Inventor： LANE FRANK ,  LAROIA RAJIV

    IPC: H04B1/38 ,  H04L20060101 ,  H04W36/00 ,  H04W36/08

    Abstract: A wireless communications system, e.g., an OFDM system, uses a plurality of carrier frequencies each with an associated frequency band. A base station sector transmitter in the system transmits ordinary signaling, e.g., user data, in its own assigned band. In addition the sector base station transmitter periodically transmits beacon signals into its own frequency band and the frequency bands used by adjacent sector transmitters for their ordinary signaling. Beacon signals, being short duration high power signals with sector transmission power concentrated on one or a few tones, are easily detectable. Each beacon signal may be identified as to the source base station sector transmitter, e.g., based on tone. A mobile node, tuned to a single carrier band, receives a plurality of beacon signals, identifies the sources of the received beacons, compares the received strength of the beacons, and makes handoff decisions, without having to switch carrier band.

    Methods and apparatus for selecting between multiple carriers using a single receiver chain tuned to a single carrier
    6.
    发明专利
    Methods and apparatus for selecting between multiple carriers using a single receiver chain tuned to a single carrier 未知

    公开(公告)号：AU2009206173A1

    公开(公告)日：2009-08-27

    申请号：AU2009206173

    申请日：2009-08-05

    Applicant: QUALCOMM INC

    Inventor： LI JUNYI ,  LANE FRANK ,  LAROIA RAJIV

    IPC: H04B1/10 ,  H04B1/00 ,  H04B1/40 ,  H04B15/00 ,  H04B17/00 ,  H04B17/40

    Abstract: Receivers accommodating carrier frequency selection methods in wireless communications systems employing multiple carrier frequencies are described. Although the receiver is tuned to a single band, an estimate of the channel quality corresponding to the currently used carrier and an alternative carrier is generated without switching between carriers. Transmitters of different cells and/or different sectors primarily use different carrier frequencies but periodically transmit using a neighboring sector's carrier frequency. Mobile node receivers use a single RF chain with a controllable RF filter to receive and process a signal within a first selected carrier band including two components, a first signal component identified with the first currently selected band and a second signal component identified with a second alternative band.; Separate quality indicator values are obtained from the first and second signal components, compared, and a determination is made as to whether the receiver's RF filter should be switched to the second band.

    Methods and apparatus of improving inter-sector and/or inter-cell handoffs in a multi-carrier wireless communications system
    8.
    发明专利
    Methods and apparatus of improving inter-sector and/or inter-cell handoffs in a multi-carrier wireless communications system 未知

    公开(公告)号：AU2008203795B2

    公开(公告)日：2011-03-17

    申请号：AU2008203795

    申请日：2008-08-08

    Applicant: QUALCOMM INC

    Inventor： LANE FRANK ,  LAROIA RAJIV

    IPC: H04B1/38 ,  H04L20060101 ,  H04W36/00 ,  H04W36/08

    Abstract: A wireless communications system, e.g., an OFDM system, uses a plurality of carrier frequencies each with an associated frequency band. A base station sector transmitter in the system transmits ordinary signaling, e.g., user data, in its own assigned band. In addition the sector base station transmitter periodically transmits beacon signals into its own frequency band and the frequency bands used by adjacent sector transmitters for their ordinary signaling. Beacon signals, being short duration high power signals with sector transmission power concentrated on one or a few tones, are easily detectable. Each beacon signal may be identified as to the source base station sector transmitter, e.g., based on tone. A mobile node, tuned to a single carrier band, receives a plurality of beacon signals, identifies the sources of the received beacons, compares the received strength of the beacons, and makes handoff decisions, without having to switch carrier band.

    10.
    发明专利
    未知

    公开(公告)号：AT450936T

    公开(公告)日：2009-12-15

    申请号：AT06772848

    申请日：2006-06-12

    Applicant: QUALCOMM INC

    Inventor： LANE FRANK ,  LAROIA RAJIV ,  LI JUNYI

    IPC: H04B7/212 ,  H04W24/00 ,  H04W48/08 ,  H04W48/16 ,  H04W72/12 ,  H04W76/02 ,  H04W84/06 ,  H04W88/08

    Abstract: A wireless terminal using OFDM signalling supporting both terrestrial and satellite base station connectivity operates using conventional access probe signalling in a first mode of operation to establish a timing synchronized wireless link with a terrestrial base station, hi a second mode of operation, used to establish a timing synchronized wireless link with a satellite base station, a slightly modified access protocol is employed. The round trip signalling time and timing ambiguity between a wireless terminal and a satellite base station is substantially greater than with a terrestrial base station. The modified access protocol uses coding of access probe signals to uniquely identify a superslot index within a beaconslot. The modified protocol uses multiple access probes with different timing offsets to further resolve timing ambiguity and allows the satellite base station access monitoring interval to remain small in duration. Terrestrial base station location/connection information is used to estimate initial timing.

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