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    Method and apparatus for combining data and retransmission data in layer domain
    52.
    发明授权
    Method and apparatus for combining data and retransmission data in layer domain 有权

    公开(公告)号：US09948430B2

    公开(公告)日：2018-04-17

    申请号：US14660462

    申请日：2015-03-17

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Alireza Bayesteh ,  Hosein Nikopour ,  Kelvin Kar Kin Au

    IPC: H04L1/18 ,  H04L5/00

    CPC classification number: H04L1/1819 ,  H04L1/0048 ,  H04L1/1887 ,  H04L5/0055

    Abstract: There is provided methods and apparatus to improve spectral efficiency in Hybrid Automated Repeat reQuest (HARQ) communications. New data and retransmission data is combined in packets using code domain multiplexing, where data layers carry data and retransmission layers carry retransmission data. This technique is leveraged to introduce Multi-Packet HARQ. The HARQ layers contain Incremental Redundancy (IR) bits to assist in the decoding of a subset of previously undecoded layers. Multiple packets are jointly decoded at the receiver. Using the properties of code multiplexing, and in particular Sparse Code Multiple Access (SCMA), the correct decoding of a subset of previously undecoded layers assists in the decoding of all previously undecoded layers. HARQ feedback for multiple packets is jointly interpreted by the receiver and the transmitter using state tables. These techniques are further leveraged to allow for Multiple-User SCMA.

    System and Method for Increasing Low Density Signature Space
    54.
    发明申请
    System and Method for Increasing Low Density Signature Space 审中-公开

    公开(公告)号：US20170214509A1

    公开(公告)日：2017-07-27

    申请号：US15482463

    申请日：2017-04-07

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Alireza Bayesteh ,  Jianglei Ma ,  Hosein Nikopour ,  Zhihang Yi

    IPC: H04L5/00 ,  H04W72/04

    Abstract: Embodiments are provided herein for increasing low density signature space for multiplexed transmissions for a plurality of users. The embodiments include generating a virtual signature using a combination operation on a plurality of basic signatures. The generated virtual signatures are provisioned as basic resource units (BRUs) for transmissions for corresponding users. The combination operation is a row-wise or column-wise permutation for combining, in each of the virtual signatures, rows or columns of corresponding basic signatures. The rows or columns represent sequences of frequency bands at one time interval or sequences of allocated time intervals at one frequency band. Alternatively, the combination operation is intra-basic resource unit (BRU) hopping. The embodiments also include generating a plurality of BRU sets comprised of virtual signatures. Each of the BRU sets is provisioned for a corresponding user.

    Systems and Methods for Sparse Code Multiple Access
    58.
    发明申请
    Systems and Methods for Sparse Code Multiple Access 审中-公开
    稀疏码多路访问系统与方法

    公开(公告)号：US20160072660A1

    公开(公告)日：2016-03-10

    申请号：US14930477

    申请日：2015-11-02

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Hosein Nikopour ,  Mohammadhadi Baligh

    IPC: H04L27/36 ,  H04L27/34

    CPC classification number: H04L27/362 ,  H04B1/707 ,  H04B7/0413 ,  H04B7/0473 ,  H04J13/00 ,  H04J13/0074 ,  H04L5/0021 ,  H04L27/345

    Abstract: Coding gains can be achieved by encoding binary data directly to multi-dimensional codewords, which circumvents QAM symbol mapping employed by conventional CDMA encoding techniques. Further, multiple access can be achieved by assigning different codebooks to different multiplexed layers. Moreover, sparse codewords can be used to reduce baseband processing complexity on the receiver-side of the network, as sparse codewords can be detected within multiplexed codewords in accordance with message passing algorithms (MPAs).

    Abstract translation: 可以通过将二进制数据直接编码到多维码字来实现编码增益，这避免了常规CDMA编码技术所采用的QAM符号映射。 此外，可以通过将不同的码本分配给不同的多路复用层来实现多址。 此外，稀疏码字可以用于降低网络接收机侧的基带处理复杂度，因为可以根据消息传递算法（MAs）在多路复用码字内检测稀疏码字。

    System and method for adaptive transmission time interval (TTI) structure
    60.
    发明授权
    System and method for adaptive transmission time interval (TTI) structure 有权

    公开(公告)号：US11039435B2

    公开(公告)日：2021-06-15

    申请号：US16191999

    申请日：2018-11-15

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Kelvin Kar Kin Au ,  Jianglei Ma ,  Liqing Zhang ,  Zhihang Yi ,  Hosein Nikopour

    IPC: H04W72/04 ,  H04W28/02 ,  H04W88/08

    Abstract: Methods and devices are provided for communicating data in a wireless channel. In one example, a method includes adapting the transmission time interval (TTI) length of transport container for transmitting data in accordance with a criteria. The criteria may include (but is not limited to) a latency requirement of the data, a buffer size associated with the data, a mobility characteristic of a device that will receive the data. The lengths may be manipulated for a variety of reasons; such as for reducing overhead, satisfy quality of service (QoS) requirements, maximize network throughput, etc. In some embodiments, TTIs having different TTI lengths may be carried in a common radio frame. In other embodiments, the wireless channel may partitioned into multiple bands each of which carrying (exclusively or otherwise) TTIs having a certain TTI length.

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