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    LTE/LTE-A UPLINK CARRIER AGGREGATION USING UNLICENSED SPECTRUM
    191.
    发明专利
    LTE/LTE-A UPLINK CARRIER AGGREGATION USING UNLICENSED SPECTRUM 未知

    公开(公告)号：CA2911397A1

    公开(公告)日：2014-12-18

    申请号：CA2911397

    申请日：2014-06-10

    Applicant: QUALCOMM INC

    Inventor： MALLADI DURGA PRASAD ,  BHUSHAN NAGA ,  LUO TAO ,  WEI YONGBIN

    IPC: H04W72/12 ,  H04L5/00 ,  H04W16/14 ,  H04W74/08

    Abstract: Methods, systems, and apparatuses are described for wireless communications. In one method, an uplink grant may be received over a licensed spectrum. A clear channel assessment (CCA) may be performed in response to the uplink grant to determine availability of an unlicensed spectrum. The CCA may be performed prior to a transmission associated with the uplink grant. In another method, scheduling information may be received over a licensed spectrum. An uplink grant may be transmitted over the licensed spectrum. The uplink grant may be based at least in part on the scheduling information. The uplink grant may be configured to trigger a CCA to determine availability of an unlicensed spectrum prior to a transmission associated with the uplink grant.

    TECHNIQUES FOR SELECTING SUBFRAME TYPE OR FOR INTERLEAVING SIGNALS FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM
    192.
    发明专利
    TECHNIQUES FOR SELECTING SUBFRAME TYPE OR FOR INTERLEAVING SIGNALS FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM 未知

    公开(公告)号：CA2909671A1

    公开(公告)日：2014-11-27

    申请号：CA2909671

    申请日：2014-05-20

    Applicant: QUALCOMM INC

    Inventor： BHUSHAN NAGA ,  MALLADI DURGA PRASAD ,  WEI YONGBIN ,  GAAL PETER ,  LUO TAO ,  JI TINGFANG ,  HORN GAVIN BERNARD ,  CHEN WANSHI ,  DAMNJANOVIC ALEKSANDAR

    IPC: H04W16/14 ,  H04L5/00

    Abstract: Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes comparing past transmission activity on an unlicensed spectrum to an activity threshold, transmitting a first subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is greater than the activity threshold, and transmitting a second subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is lesser than the activity threshold, the second subframe type comprising a more robust subframe type than the first subframe type. A second method includes generating one or both of PUCCH signals and PUSCH signals based on interleaved signals that increase nominal bandwidth occupancy in an unlicensed spectrum, and transmitting the generated signals in the unlicensed spectrum. A third method includes receiving the PUCCH signals and the PUSCH signals.

    CONCURRENT WIRELESS COMMUNICATIONS OVER LICENSED AND UNLICENSED SPECTRUM
    194.
    发明专利
    CONCURRENT WIRELESS COMMUNICATIONS OVER LICENSED AND UNLICENSED SPECTRUM 未知

    公开(公告)号：CA2909632A1

    公开(公告)日：2014-11-27

    申请号：CA2909632

    申请日：2014-05-20

    Applicant: QUALCOMM INC

    Inventor： BHUSHAN NAGA ,  MALLADI DURGA PRASAD ,  WEI YONGBIN ,  GAAL PETER ,  LUO TAO ,  JI TINGFANG ,  HORN GAVIN BERNARD ,  CHEN WANSHI ,  DAMNJANOVIC ALEKSANDAR

    IPC: H04W76/02

    Abstract: Methods and apparatuses are described for wireless communications. A first method includes transmitting a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal to a wireless node in a licensed spectrum, and transmitting, concurrently with the transmission of the first OFDMA communications signal, a second OFDMA communications signal to the wireless node in an unlicensed spectrum. A second method includes receiving a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal from a wireless node in a licensed spectrum, and receiving, concurrently with the reception of the first OFDMA communications signal, a second OFDMA communication signal from the wireless node in an unlicensed spectrum. A third method includes generating a periodic gating interval for a cellular downlink in an unlicensed spectrum, and synchronizing at least one boundary of the periodic gating interval with at least one boundary of a periodic frame structure associated with a primary component carrier of the cellular downlink.

    FLEXIBLE SIGNALING OF RESOURCES ON A CONTROL CHANNEL
    195.
    发明专利
    FLEXIBLE SIGNALING OF RESOURCES ON A CONTROL CHANNEL 未知

    公开(公告)号：CA2683563C

    公开(公告)日：2014-11-18

    申请号：CA2683563

    申请日：2008-05-02

    Applicant: QUALCOMM INC

    Inventor： FARAJIDANA AMIR ,  MALLADI DURGA PRASAD ,  MONTOJO JUAN ,  CHEN WANSHI

    IPC: H04W72/14

    Abstract: Systems and methodologies are described that facilitate employing flexible signaling of resource block assignments on a control channel. Resource blocks associated with an uplink or downlink channel can be split into a plurality of groups, and group-specific signaling constraints can be utilized with each of these groups. For example, the group-specific signaling constraints can relate to minimum resource block allocation units, signaling structures (e.g., bitmap structure, contiguous allocation structure, tree-based structure, ), and the like utilized for sending assignment indications that allocate resource blocks within the respective groups. Further, an access terminal can have a common understanding of the group-specific signaling constraints; thus, a received assignment indication can be deciphered by the access terminal by utilizing the group-specific signaling constraints.

    196.
    发明专利
    未知

    公开(公告)号：BRPI0720513A2

    公开(公告)日：2014-11-18

    申请号：BRPI0720513

    申请日：2007-10-01

    Applicant: QUALCOMM INC

    Inventor： MALLADI DURGA PRASAD ,  KIM BYOUNG-HOON ,  LUO TAO

    IPC: H04L27/26 ,  H04B1/707 ,  H04J13/00 ,  H04J13/10

    Abstract: Techniques for facilitating cell search by user equipments (UEs) in a wireless communication system are described. In an aspect, a primary synchronization code (PSC) sequence may be generated based on a Frank sequence and a constant amplitude sequence that is repeated multiple times. In another aspect, a set of PSC sequences may be generated based on complementary sequences having good aperiodic correlation properties and efficient implementations. In one design, PSC sequences A+B and B+A may be formed based on Golay complementary sequences A and B, there '+' denotes concatenation. In yet another aspect, a set of secondary synchronization code (SSC) sequences may be generated based on a set of base sequences and different modulation symbols of a modulation scheme. Each base sequence may be modulated by each of M possible modulation symbols for the modulation scheme to obtain M different SSC sequences.

    197.
    发明专利
    未知

    公开(公告)号：BRPI0720512A2

    公开(公告)日：2014-11-18

    申请号：BRPI0720512

    申请日：2007-10-02

    Applicant: QUALCOMM INC

    Inventor： MALLADI DURGA PRASAD ,  KIM BYOUNG-HOON

    IPC: H04L1/16 ,  H04B7/04 ,  H04L5/02

    Abstract: Techniques for transmitting acknowledgement (ACK) information in a wireless communication system are described. The system supports data transmission to multiple user equipments (UEs) on the same downlink resources with spatial division multiple access (SDMA). A base station sends a data transmission with multiple (M) layers to M UEs. The downlink resources used for the data transmission are associated with ACK resources used to send ACK information for the data transmission. The ACK resources may be partitioned into M portions, e.g., based on frequency division multiplexing (FDM). Each of the M layers is associated with a respective portion of the ACK resources. A recipient UE for each layer sends ACK for that layer on the associated portion of the ACK resources. For each ACK resource portion, one or more pilot symbols may be sent on one or more resource elements, and ACK symbols may be sent on remaining resource elements.

    USING CODEWORDS IN A WIRELESS COMMUNICATION SYSTEM
    200.
    发明专利
    USING CODEWORDS IN A WIRELESS COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2676054C

    公开(公告)日：2014-07-08

    申请号：CA2676054

    申请日：2008-02-08

    Applicant: QUALCOMM INC

    Inventor： KIM BYOUNG-HOON ,  MALLADI DURGA PRASAD ,  DOAN DUNG N

    IPC: H04W28/18

    Abstract: Systems, methodologies, and devices are described that can facilitate bandwidth efficient non-coherent signaling for uplink control channel transmissions. A communication device (e.g., a mobile device, base station) can be configured to utilize or generate a set of complex orthogonal codewords to facilitate transmission of control channel information using non-coherent signaling in a bandwidth efficient manner. A complex orthogonal codeword set can comprise a first subset of codewords where such codewords have a desirable cross-correlation property and another subset(s) of codewords that can include expurgated codewords, where the expurgated codewords can include discarded codewords and/or codeword pairs that produce a worst-case cross-correlation property. The codeword set and subsets are determined based at least in part on a predefined codeword criterion. A portion of the discarded codewords can be used for other purposes, such as erasure decoding, interference-level estimation, and/or multi-mode control channel operation.

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