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101 records (took 0.024 seconds)

    41.
    发明专利
    未知

    公开(公告)号：BRPI0812066A2

    公开(公告)日：2014-11-25

    申请号：BRPI0812066

    申请日：2008-05-27

    Applicant: QUALCOMM INC

    Inventor： RICHARDSON THOMAS ,  PARIZHSKY VLADIMIR

    IPC: H04B7/04

    Abstract: Methods and apparatus for improved utilization of air link resources are discussed in wireless communications systems employing multi-sector base stations and wireless terminals with multiple antennas. Timing synchronization is maintained across the base station sectors, and the same set of tones are used in adjacent sectors. In a sector boundary region, which is typically a high interference region, a wireless terminal is set to a sector pair state and operated in a MIMO mode of operation, communicating with two adjacent base station antenna faces of the same base station concurrently, the two different adjacent base station antenna faces corresponding to different adjacent sectors. Thus, typically high interference sector boundary regions, are converted into high capacity regions by having the sectors coordinated and utilizing MIMO techniques.

    METHODS AND APPARATUS FOR WIRELESS COMMUNICATIONS INCLUDING DIRECT PAGING IN COMBINATION WITH HOPPED DATA SIGNALING
    48.
    发明专利
    METHODS AND APPARATUS FOR WIRELESS COMMUNICATIONS INCLUDING DIRECT PAGING IN COMBINATION WITH HOPPED DATA SIGNALING 未知

    公开(公告)号：CA2714463A1

    公开(公告)日：2009-09-17

    申请号：CA2714463

    申请日：2009-02-24

    Applicant: QUALCOMM INC

    Inventor： LI JUNYI ,  LAROIA RAJIV ,  PARK VINCENT D ,  RICHARDSON THOMAS ,  TAVILDAR SAURABH ,  WU XINZHOU

    IPC: H04W88/04

    Abstract: Methods and apparatus for wireless communications in regional networks, e.g., ad hoc peer to peer networks, are described. Wireless communications devices transmit and monitor for presence indicator signals broadcast from other peer communications devices in its local vicinity. A wireless communications device maintains a list of discovered devices in its vicinity. A first wireless communications device transmits a paging signal directly over an airlink to a second communications device, which is on its list and to which it desires to send data units, e.g., user data in a peer to peer traffic segment. In response to a received paging response signal from the second device, the first device transmits data units, intended for the second device, to a third device, which acts as an intermediary node. The power level for the data unit signal is controlled to be lower than the power level used for the paging signal.

    METHODS AND APPARATUS FOR IMPROVED UTILIZATION OF AIR LINK RESOURCES IN A WIRELESS COMMUNICATIONS SYSTEM
    49.
    发明专利
    METHODS AND APPARATUS FOR IMPROVED UTILIZATION OF AIR LINK RESOURCES IN A WIRELESS COMMUNICATIONS SYSTEM 未知

    公开(公告)号：CA2681618A1

    公开(公告)日：2008-12-11

    申请号：CA2681618

    申请日：2008-05-27

    Applicant: QUALCOMM INC

    Inventor： RICHARDSON THOMAS ,  JIN HUI ,  LAROIA RAJIV

    IPC: H04L5/02 ,  H04B7/005 ,  H04B7/06 ,  H04B14/02 ,  H04L1/00 ,  H04L25/02 ,  H04L25/49 ,  H04L27/26

    Abstract: Methods and apparatus for improving the utilization of air link resources in a wireless communications system, e.g., an OFDM MIMO system, including a base station with multiple transmit antennas are described. Superposition s ignaling in the downlink is employed. The superimposed signal includes a fir st transform result signal and a second lower power signal. The first transf orm result signal is generated from a first signal, which uses position modu lation, e.g., including null components and high power non-null components. Different components of the first transform result signal are directed to di fferent transmit antennas. The first transform result signal communicates in formation to a first wireless terminal, e.g., a weak receiver. The non-null received elements of the first transform result signal are utilized by a sec ond wireless terminal, e.g., a superior receiver, as pilots to determine a c hannel estimate. The second wireless terminal uses the determined channel es timate to demodulate received second signals.

    Sectorized base stations as multiple antenna systems
    50.
    发明专利
    Sectorized base stations as multiple antenna systems 未知

    公开(公告)号：AU2008260211A1

    公开(公告)日：2008-12-11

    申请号：AU2008260211

    申请日：2008-05-27

    Applicant: QUALCOMM INC

    Inventor： RICHARDSON THOMAS ,  PARIZHSKY VLADIMIR

    IPC: H04B7/04

    Abstract: Methods and apparatus for improved utilization of air link resources are discussed in wireless communications systems employing multi-sector base stations and wireless terminals with multiple antennas. Timing synchronization is maintained across the base station sectors, and the same set of tones are used in adjacent sectors. In a sector boundary region, which is typically a high interference region, a wireless terminal is set to a sector pair state and operated in a MIMO mode of operation, communicating with two adjacent base station antenna faces of the same base station concurrently, the two different adjacent base station antenna faces corresponding to different adjacent sectors. Thus, typically high interference sector boundary regions, are converted into high capacity regions by having the sectors coordinated and utilizing MIMO techniques.

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