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    APPARATUS AND METHOD FOR SCHEDULING OVER MULTIPLE HOPS
    111.
    发明专利
    APPARATUS AND METHOD FOR SCHEDULING OVER MULTIPLE HOPS 未知

    公开(公告)号：CA2713080C

    公开(公告)日：2015-08-18

    申请号：CA2713080

    申请日：2009-02-12

    Applicant: QUALCOMM INC

    Inventor： HORN GAVIN B ,  AGRAWAL AVNEESH ,  SAMPATH ASHWIN ,  GOROKHOV ALEXEI Y ,  BHUSHAN NAGA

    IPC: H04W72/02 ,  H04W40/22 ,  H04W84/18

    Abstract: Systems and methodologies are described that facilitate scheduling over multiple hops in a wireless communication network. Radio resources can be partitioned into sets of sub-frames that can be allocated statically and/or dynamically. Statically allocated radio resources can be reassigned over time based on the loading on each hop and/or throughput imbalance. In addition, dynamic assignment of sub-frames to each hop can be based on traffic or channel conditions. Moreover, the radio resources can be dynamically allocated in a distributed scheme, wherein a base station controls the scheduling of resources, or a centralized scheme, wherein a relay station controls the scheduling of resources. Furthermore the allocation of radio resources can be transparent or explicit. In the transparent case, the access terminal listens directly to the base station, and the relay station does not transmit control information, such as DL or UL assignments. Conversely, when the allocation of resources is explicit the relay station does transmit control information.

    METHODS AND APPARATUS FOR FLEXIBLE SPECTRUM ALLOCATION IN COMMUNICATION SYSTEMS
    112.
    发明专利
    METHODS AND APPARATUS FOR FLEXIBLE SPECTRUM ALLOCATION IN COMMUNICATION SYSTEMS 未知

    公开(公告)号：CA2736063C

    公开(公告)日：2015-06-23

    申请号：CA2736063

    申请日：2005-03-03

    Applicant: QUALCOMM INC

    Inventor： GOROKHOV ALEXEI ,  AGRAWAL AVNEESH

    IPC: H04W16/14 ,  H04B7/26 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26 ,  H04Q7/36 ,  H04Q7/38 ,  H04W28/26

    Abstract: The disclosed embodiments provide for methods and systems for flexibly allocating a shared frequency spectrum to a plurality of users, the spectrum may have a first number of segments, each segment having a second number of clusters associated with a certain sector/cell. In one aspect, a method for flexibly allocating a shared frequency spectrum to a plurality of users comprises the acts of fixedly assigning a first group of clusters to a first group of users, such that the first group of users stay fixed to the assigned clusters, and assigning a second group of clusters to a second group of users, such that the second group of users hop within the assigned clusters.

    “METHOD AND APPARATUS FOR ESTIMATING REVERSE LINK LOADING IN A WIRELESS COMMUNICATION SYSTEM”
    113.
    发明专利
    “METHOD AND APPARATUS FOR ESTIMATING REVERSE LINK LOADING IN A WIRELESS COMMUNICATION SYSTEM” 未知

    公开(公告)号：IN252MUN2013A

    公开(公告)日：2015-06-05

    申请号：IN252MUN2013

    申请日：2013-02-04

    Applicant: QUALCOMM INC

    Inventor： BLACK PETER JOHN ,  MILIKOVSKY DMITRY R ,  AGRAWAL AVNEESH

    IPC: H04B17/00

    Abstract: Method and apparatus for estimating reverse link loading in a wireless communication system. The reverse link interference is measured and reverse link receiver noise is measured. The reverse link interference is compared to the reverse link receiver noise, for example, by dividing the interference power by the receiver noise power. The reverse link receiver noise can be measured in an orthogonal frequency division multiple access (OFDMA) system by nulling transmission from access terminals within the cell and nearby during a null time and frequency interval. Power measure in the null time and frequency interval is receiver noise power. The reverse link interference can be measure by several means. For example, local null time and frequency intervals can be designated. The access terminals within the cell null their transmissions during the local time and frequency intervals. Access terminals outside the cell continue to transmit during the local time and frequency intervals. Power measured in the local time and frequency interval is interference power. As another example, interference power can be measured by subtracting pairs of pilot symbols that are contiguous to each other in time or frequency.

    FAST FREQUENCY HOPPING WITH A CODE DIVISION MULTIPLEXED PILOT IN AN OFDMA SYSTEM
    116.
    发明专利
    FAST FREQUENCY HOPPING WITH A CODE DIVISION MULTIPLEXED PILOT IN AN OFDMA SYSTEM 未知

    公开(公告)号：CA2525566C

    公开(公告)日：2014-12-30

    申请号：CA2525566

    申请日：2004-05-07

    Applicant: QUALCOMM INC

    Inventor： AGRAWAL AVNEESH ,  TEAGUE EDWARD HARRISON

    IPC: H04W72/12 ,  H04B1/707 ,  H04B1/7115 ,  H04B1/76 ,  H04J3/02 ,  H04J4/00 ,  H04J11/00 ,  H04L5/02 ,  H04L27/26

    Abstract: Techniques are provided to support fast frequency hopping with a code division multiplexed (CDM) pilot in a multi-carrier communication system (e.g., an OFDMA system). Each transmitter (e.g., each terminal) in the system transmits a wideband pilot on all subbands to allow a receiver (e.g., a base station) to estimate the entire channel response at the same time. The wideband pilot for each transmitter may be generated using direct sequence spread spectrum processing and based on a pseudo-random number (PN) code assigned to that transmitter. This allows the receiver to individually identify and recover multiple wideband pilots transmitted concurrently by multiple transmitters. For a time division multiplexed (TDM)/CDM pilot transmission scheme, each transmitter transmits the wideband pilot in bursts. For a continuous CDM pilot transmission scheme, each transmitter continuously transmits the wideband pilot, albeit at a low transmit power level. Any frequency hopping rate may be supported without impacting pilot overhead.

    MULTI-ANTENNA SYSTEM TO SIMULTANEOUS SUPPORT OF MISO AND MIMO RECEIVERS
    117.
    发明专利
    MULTI-ANTENNA SYSTEM TO SIMULTANEOUS SUPPORT OF MISO AND MIMO RECEIVERS 未知

    公开(公告)号：CA2657472C

    公开(公告)日：2014-08-19

    申请号：CA2657472

    申请日：2004-12-03

    Applicant: QUALCOMM INC

    Inventor： GORE DHANANJAY ASHOK ,  AGRAWAL AVNEESH ,  KADOUS TAMER

    IPC: H04J99/00 ,  H04W24/06 ,  H04B7/04 ,  H04B7/06 ,  H04B17/00 ,  H04J11/00 ,  H04L1/20 ,  H04L25/02 ,  H04L27/26

    Abstract: Efficient pilot transmission schemes for multi--antenna communication systems are described. In general, MISO receivers prefer a pilot transmitted in one spatial direction, and MIMO receivers typically require a pilot transmitted in different spatial directions. In one pilot transmission scheme, a first set of T scaled pilot symbols is generated with a first training vector and transmitted (e.g., continuously) from T transmit antennas, where T > 1. If MIMO receiver(s) are to be supported by the system, then at least T-1 additional sets of T scaled pilot symbols are generated with at least T-1 additional training vectors and transmitted from the T transmit antennas. The training vectors are for different (e.g., orthogonal) spatial directions. Each MISO receiver can estimate its MISO channel based on the first set of scaled pilot symbols. Each MIMO receiver can estimate its MIMO channel based on the first and additional sets of scaled pilot symbols.

    POWER CONTROL USING MULTIPLE RATE INTERFERENCE INDICATIONS
    120.
    发明专利
    POWER CONTROL USING MULTIPLE RATE INTERFERENCE INDICATIONS 未知

    公开(公告)号：CA2635291C

    公开(公告)日：2013-10-01

    申请号：CA2635291

    申请日：2007-01-05

    Applicant: QUALCOMM INC

    Inventor： BORRAN MOHAMMAD J ,  KHANDEKAR AAMOD ,  JI TINGFANG ,  AGRAWAL AVNEESH

    IPC: H04B7/005

    Abstract: Systems and methodologies are described that facilitate mitigation of interference in a wireless communication environment. Terminals can utilize interference information provided by neighboring sectors to adjust transmit power and reduce interference. Access points can provide two sets or types of interference information. The first type can be transmitted over a large coverage area, requiring significant overhead and limiting the transmission rate. Access points can also provide a second set or type of interference information directed at smaller coverage area, such as an area proximate to the edge of the supported sector. This second type of interference information can be utilized by terminals that include the access point within their active set. The second set of interference information can be provided at a higher rate than the first set due to decreased overhead requirements. Terminals can utilize both sets of interference information to adjust transmit power.

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