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201 records (took 0.025 seconds)

    104.
    发明专利
    未知

    公开(公告)号：AT484117T

    公开(公告)日：2010-10-15

    申请号：AT07759412

    申请日：2007-03-26

    Applicant: QUALCOMM INC

    Inventor： KIM BYOUNG-HOON ,  MALLADI DURGA PRASAD ,  DAMNJANOVIC JELENA

    IPC: H04L1/00 ,  H04B7/06 ,  H04L27/26

    Abstract: Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state information may be sent as feedback.

    105.
    发明专利
    未知

    公开(公告)号：DE602006004003D1

    公开(公告)日：2009-01-15

    申请号：DE602006004003

    申请日：2006-02-13

    Applicant: QUALCOMM INC

    Inventor： DAMNJANOVIC JELENA ,  MALLADI DURGA PRASAD

    IPC: H04W16/02 ,  H04W16/12

    Abstract: Techniques to mitigate inter-cell interference using joint time and frequency division are described. A frequency band is divided into multiple non-overlapping frequency subbands. The transmission timeline is divided into T in and T out time intervals. Data is exchanged with users in at least one inner region of a cell on the entire frequency band in the T in time intervals. Data is exchanged with users in multiple outer regions of the cell on the multiple frequency subbands in the Tout time intervals. The frequency band may be partitioned into three frequency subbands. Data may then be exchanged with users in first, second and third outer regions on first, second and third frequency subbands, respectively. The regions in which the users are located may be determined based on pilot and/or other measurements.

    107.
    发明专利
    未知

    公开(公告)号：BRPI0507032A

    公开(公告)日：2007-06-05

    申请号：BRPI0507032

    申请日：2005-01-24

    Applicant: QUALCOMM INC

    Inventor： DAMNJANOVIC JELENA ,  MALLADI DURGA P ,  WILLENEGGER SERGE D

    IPC: H04B7/26 ,  H04L1/00 ,  H04L12/56 ,  H04W72/10 ,  H04W72/12

    Abstract: Method and apparatus for a channel sensitive scheduler for scheduling transmissions in a communication system. The scheduler is defined by a priority function of the channel condition as determined by amount of transmission power needed by a mobile station. In one embodiment the channel condition is determined based on the transmission pilot power of each mobile station and is used to calculate a priority value for each mobile station. The mobile stations are then scheduled to transmit based on the priority value.

    109.
    发明专利
    未知

    公开(公告)号：BRPI0406730A

    公开(公告)日：2005-12-20

    申请号：BRPI0406730

    申请日：2004-01-12

    Applicant: QUALCOMM INC

    Inventor： JAIN AVINASH ,  DAMNJANOVIC JELENA ,  CHEN TAO

    IPC: H04W28/14 ,  H04W28/22 ,  H04W52/00 ,  H04W52/12 ,  H04W52/54 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04L12/56

    Abstract: A system and method for a time-scalable priority-based scheduler. A flexible scheduling algorithm utilizing variable scheduling durations enables better system capacity utilization. A rate request is transmitted if data arrives in a buffer, data in the buffer exceeds a buffer depth, and sufficient power exists to transmit at the rate requested. A rate assignment responsive to the rate request indicates a scheduled duration and a scheduled rate applicable for the scheduled duration. The scheduled duration is less than or equal to a scheduling period. The scheduling period is an interval of time and after which a scheduler makes a scheduling decision. The scheduling period is variable and the scheduled duration is variable.

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