公开(公告)号：US20190190753A1

公开(公告)日：2019-06-20

申请号：US15844015

申请日：2017-12-15

申请人： ALIREZA BAYESTEH ,  MING JIA ,  SANJEEWA HERATH ,  JIANGLEI MA

发明人： ALIREZA BAYESTEH ,  MING JIA ,  SANJEEWA HERATH ,  JIANGLEI MA

IPC分类号： H04L27/26 ,  H04L27/36 ,  H04B1/69

摘要： Aspects of the present disclosure provide a scheme for generating a multiple access (MA) signal that include mapping each of at least one stream of bits to generate a set of modulated symbols and transmitting the set of modulated symbols. The spreading signatures that are selected to map the at least one stream of bits are selected, at least in part, based on a set of compatibility rules. The spreading involves mapping each stream of bits using a respective spreading signature from a set of spreading signatures to generate a respective set of modulated symbols, wherein real spreading signature components of the spreading signatures are orthogonal to each other and imaginary spreading signature components of the spreading signatures are orthogonal to each other.

公开(公告)号：US20180279315A1

公开(公告)日：2018-09-27

申请号：US15910238

申请日：2018-03-02

申请人： MOHAMED ADEL SALEM ,  TOUFIQUL ISLAM ,  SANJEEWA HERATH ,  ALIREZA BAYESTEH

发明人： MOHAMED ADEL SALEM ,  TOUFIQUL ISLAM ,  SANJEEWA HERATH ,  ALIREZA BAYESTEH

IPC分类号： H04W72/08 ,  H04W72/04

CPC分类号： H04W72/08 ,  H04L1/00 ,  H04L1/0025 ,  H04L1/0072 ,  H04L1/08 ,  H04L1/1671 ,  H04L1/203 ,  H04W72/042

摘要： Methods and devices for enhancing the spectral efficiency and/or reliability of uplink transmission without grant are provided. Uplink transmissions without grant are transmitted by UEs or received by base stations in accordance with resource groups that map initial uplink transmissions without grant and non-zero numbers of re-transmissions without grant to sub-regions of a grant-free region of a time-frequency resource.

公开(公告)号：US20220151012A1

公开(公告)日：2022-05-12

申请号：US17582557

申请日：2022-01-24

申请人： JAVAD ABDOLI ,  SANJEEWA HERATH

发明人： JAVAD ABDOLI ,  SANJEEWA HERATH

IPC分类号： H04W76/27 ,  H04L5/00 ,  H04W72/12

摘要： Some aspects of the present disclosure introduce a new downlink (DL) bandwidth part (BWP) and a new uplink (UL) BWP for communication in the RRC_INACTIVE state. In addition, aspects of the disclosure also provide for configuring generic parameters of the BWP, which include, but not limited to, frequency location, bandwidth, subcarrier spacing (SCS), and cyclic prefix (CP). Some aspects of the present disclosure may support a reinterpretation of generic parameters of a BWP, for example which may be configured for the RRC_CONNECTED state, to be used in the RRC_INACTIVE state. Some aspects of the present disclosure are directed to implicit DL BWP switching in the RRC_INACTIVE state where no BWP identifier (ID) indication is needed as part of the switching mechanism.

公开(公告)号：US11070245B1

公开(公告)日：2021-07-20

申请号：US16999747

申请日：2020-08-21

申请人： Sanjeewa Herath ,  Monirosharieh Vameghestahbanati ,  Javad Abdoli

发明人： Sanjeewa Herath ,  Monirosharieh Vameghestahbanati ,  Javad Abdoli

IPC分类号： H04B1/707 ,  H04L27/26 ,  H04B1/02

摘要： A transmission method, and corresponding transmitter are provided that use a combination of sparse symbol mapping with non-sparse spreading. This can be used for a low-PAPR multiple access scheme where good performance is achieved by sparse domain multi-user detection. The provided method uses per-frequency block time-domain non-sparse spreading across sparse blocks which provides PAPR reduction. Sparsity patterns are partitioned into groups that allows PAPR reduction. The method may be used to support the transmission of a single-carrier signal, e.g. DFT-spread signal, to provide PAPR reduction. More generally the provided method can use any low-PAPR waveform, for example any single-carrier waveform or any single-subcarrier waveform.

公开(公告)号：US11050532B2

公开(公告)日：2021-06-29

申请号：US16369023

申请日：2019-03-29

申请人： Ming Jia ,  Jianglei Ma ,  Alireza Bayesteh ,  Sanjeewa Herath

发明人： Ming Jia ,  Jianglei Ma ,  Alireza Bayesteh ,  Sanjeewa Herath

IPC分类号： H04L5/00 ,  H04L27/26 ,  H04L1/00

摘要： A bit-level operation may be implemented prior to modulation and resource element (RE) mapping in order to generate a NoMA transmission using standard (QAM, QPSK, BPSK, etc.) modulators. In this way, the bit-level operation is exploited to achieve the benefits of NoMA (e.g., improved spectral efficiency, reduced overhead, etc.) at significantly less signal processing and hardware implementation complexity. The bit-level operation is specifically designed to produce an output bit-stream that is longer than the input bit-stream, and that includes output bit-values that are computed as a function of the input bit-values such that when the output bit-stream is subjected to modulation (e.g., m-ary QAM, QPSK, BPSK), the resulting symbols emulate a spreading operation that would otherwise have been generated from the input bit-stream, either by a NoMA-specific modulator or by a symbol-domain spreading operation.

公开(公告)号：US20200092057A1

公开(公告)日：2020-03-19

申请号：US16565744

申请日：2019-09-10

申请人： SANJEEWA HERATH ,  ALIREZA BAYESTEH ,  YIQUN GE ,  JIANGLEI MA

发明人： SANJEEWA HERATH ,  ALIREZA BAYESTEH ,  YIQUN GE ,  JIANGLEI MA

IPC分类号： H04L5/00 ,  H04W72/04 ,  H04L1/00

摘要： A system and method of non-orthogonal multiple access (NoMA) transmission using a configurable NoMA scheme is provided. A bit level processor, a modulation block, a phase and amplitude adjuster, and a symbol to resource element mapper collectively produce a NoMA signal for output or transmission. A NoMA scheme implemented by the system and method is configurable through one or more NoMA configuration inputs that configure one or more of the bit level processor, the modulation block, the phase and amplitude adjustment block and the symbol to resource element mapper. A multiple access (MA) signature produced by the apparatus once configured for the particular NoMA scheme is selectable through one or more MA signature inputs.

公开(公告)号：US20190140779A1

公开(公告)日：2019-05-09

申请号：US15869156

申请日：2018-01-12

申请人： MING JIA ,  JIANGLEI MA ,  SANJEEWA HERATH ,  ALIREZA BAYESTEH

发明人： MING JIA ,  JIANGLEI MA ,  SANJEEWA HERATH ,  ALIREZA BAYESTEH

IPC分类号： H04L1/16 ,  H04L27/00 ,  H04L5/00 ,  H04L1/00

摘要： Methods of transmitting and receiving a set of bits are provided. In the transmitting method, some of the bits are mapped to modulated symbol, and some of the bits map to a subset of transmission resources out of a first set of transmission resources. The modulated symbol is transmitted using the subset of transmission resources. At the receiver, a modulated symbol is received using a subset of transmission resources. Some bits are recovered by demodulating the demodulated symbol, and some of the bits are recovered based on the subset of transmission resources over which the modulated symbol was received.

公开(公告)号：US20220167387A1

公开(公告)日：2022-05-26

申请号：US17668765

申请日：2022-02-10

申请人： JAVAD ABDOLI ,  SANJEEWA HERATH

发明人： JAVAD ABDOLI ,  SANJEEWA HERATH

IPC分类号： H04W72/12 ,  H04L1/18 ,  H03M13/09 ,  H04W72/04

摘要： Control signaling mechanisms are provided to support data transmissions to or from a user equipment (UE) in an inactive state. In some embodiments, a UE in an inactive state receives DCI including: a cyclic redundancy check (CRC) scrambled by a radio network temporary identifier (RNTI) that is specific to a group of UEs, the group of UEs including the UE; and a resource assignment for a data transmission to the UE. The data transmission is then received on a physical shared channel. In further embodiments, a UE in an inactive state receives DCI including: a CRC scrambled by a paging RNTI; and a resource assignment for a paging message to the UE. A data transmission is received by the UE in the paging message or in a further transmission that is scheduled by the paging message.

公开(公告)号：US11240867B2

公开(公告)日：2022-02-01

申请号：US16664340

申请日：2019-10-25

申请人： Javad Abdoli ,  Sanjeewa Herath

发明人： Javad Abdoli ,  Sanjeewa Herath

IPC分类号： H04W76/27 ,  H04W72/04 ,  H04W68/02 ,  H04W52/02 ,  H04L5/00

摘要： Some aspects of the present disclosure introduce a new downlink (DL) bandwidth part (BWP) and a new uplink (UL) BWP for communication in the RRC_INACTIVE state. In addition, aspects of the disclosure also provide for configuring generic parameters of the BWP, which include, but not limited to, frequency location, bandwidth, subcarrier spacing (SCS), and cyclic prefix (CP). Some aspects of the present disclosure may support a reinterpretation of generic parameters of a BWP, for example which may be configured for the RRC_CONNECTED state, to be used in the RRC_INACTIVE state. Some aspects of the present disclosure are directed to implicit DL BWP switching in the RRC_INACTIVE state where no BWP identifier (ID) indication is needed as part of the switching mechanism.

公开(公告)号：US20220029768A1

公开(公告)日：2022-01-27

申请号：US16937823

申请日：2020-07-24

申请人： SANJEEWA HERATH ,  JAVAD ABDOLI

发明人： SANJEEWA HERATH ,  JAVAD ABDOLI

IPC分类号： H04L5/00 ,  H04L27/26

摘要： Systems and methods for transmitting uplink control information, for example ACK/NACK, while in RRC_inactive state, are provided. Uplink control information is transmitted while in RRC_INACTIVE state by transmitting a sequence from a set of possible sequences to convey the uplink control information, the transmitted sequence associated with a value of the uplink control information. The sequence is asynchronously transmitted. Signalling may be used to configure a transmission resource within which to transmit the sequence, wherein the transmission resource has a time duration that is longer than a time duration to transmit the sequence. This has the effect of introducing a gap following sequence transmission that can ensure the sequence transmission does not interfere with a data transmission.