公开(公告)号：US11700102B2

公开(公告)日：2023-07-11

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

CPC分类号： H04L5/0055 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0094 ,  H04L27/2604

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.

公开(公告)号：US20220109538A1

公开(公告)日：2022-04-07

申请号：US17064098

申请日：2020-10-06

申请人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA ,  JAVAD ABDOLI

发明人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA ,  JAVAD ABDOLI

IPC分类号： H04L5/00 ,  H04L25/02 ,  H04L27/10

摘要： A reference signaling scheme is provided that is based on the use of a Zadoff Chu sequence with cyclic repetition, optionally code division multiplexing precoding, together with frequency domain spectral shaping (FDSS). A specific pulse shape design for the FDSS part of the reference signal scheme in some embodiments involves the use of a raised cosine pulse raised to the power of β. The new solution for generating reference signals has a Low peak average power ratio that matches the PAPR of SC-OQAM, good channel estimation performance, and the ability to implement CDM in the frequency domain to increase multiplexing gain.

公开(公告)号：US11038641B2

公开(公告)日：2021-06-15

申请号：US15374065

申请日：2016-12-09

申请人： Yu Cao ,  Javad Abdoli ,  Jianglei Ma

发明人： Yu Cao ,  Javad Abdoli ,  Jianglei Ma

IPC分类号： H04L5/00 ,  H04W74/00 ,  H04W74/08 ,  H04W72/08

摘要： Systems and methods are provided in which uplink transmission of pilot uses time-frequency resources that overlap with time-resources for the uplink transmission of data, by the same UE or different UEs. This can result in a decrease in pilot overhead, or if longer pilot sequences are used, can result in a decrease in collision probability. In a group-based approach, UEs are organized into groups, and each group is allocated the same resources for pilot and data.

公开(公告)号：US20190215847A1

公开(公告)日：2019-07-11

申请号：US16222288

申请日：2018-12-17

申请人： JAVAD ABDOLI ,  ZHENFEI TANG

发明人： JAVAD ABDOLI ,  ZHENFEI TANG

IPC分类号： H04W72/12 ,  H04W72/04

CPC分类号： H04W72/1263 ,  H04W72/0453

摘要： A user equipment (UE) receives control signaling in a scheduling bandwidth part (BWP). The control signaling indicates switching from a first active BWP to a second active BWP or switching from a first active BWP pair to a second active BWP pair for the UE. The control signaling aligns with a time unit boundary, such as a slot boundary, that is associated with the scheduling BWP. In the event that a scheduled BWP for a UE has a different numerology than a scheduling BWP that is currently active for the UE, the UE could switch from the scheduling BWP to the scheduled BWP based on a control signaling monitoring periodicity of the scheduled BWP.

公开(公告)号：US20180167182A1

公开(公告)日：2018-06-14

申请号：US15374065

申请日：2016-12-09

申请人： YU CAO ,  JAVAD ABDOLI ,  JIANGLEI MA

发明人： YU CAO ,  JAVAD ABDOLI ,  JIANGLEI MA

IPC分类号： H04L5/00 ,  H04W72/08

摘要： Systems and methods are provided in which uplink transmission of pilot uses time-frequency resources that overlap with time-resources for the uplink transmission of data, by the same UE or different UEs. This can result in a decrease in pilot overhead, or if longer pilot sequences are used, can result in a decrease in collision probability. In a group-based approach, UEs are organized into groups, and each group is allocated the same resources for pilot and data.

公开(公告)号：US20170272278A1

公开(公告)日：2017-09-21

申请号：US15076128

申请日：2016-03-21

申请人： JAVAD ABDOLI ,  MING JIA

发明人： JAVAD ABDOLI ,  MING JIA

IPC分类号： H04L25/02 ,  H04W74/08 ,  H04L5/00

CPC分类号： H04L25/0202 ,  H04L5/0048 ,  H04L25/0226 ,  H04L25/0256 ,  H04L27/2647 ,  H04W74/0833

摘要： Systems and methods for detecting potentially active user equipment (UE) in a network are provided. A set of potentially active UEs is detected using an iterative method. In a first iteration UE detection is performed using compressed sensing (CS) based on first pilot sequences to detect a first set of potentially active UEs. Channel estimation is then performed for the first set of potentially active UEs. In subsequent iterations, UE detection is performed using CS to detect another set, typically reduced in size, of potentially active UEs using results of the channel estimation from the previous iteration. Channel estimation is then again performed for the new set of potentially active UEs. After the last iteration, the set of potentially active UEs detected in the last iteration is output as the determined set of potentially active UEs along with channel estimates for the set of potentially active UEs determined in last iteration.

公开(公告)号：US20220158872A1

公开(公告)日：2022-05-19

申请号：US17586957

申请日：2022-01-28

申请人： SANJEEWA HERATH ,  JAVAD ABDOLI ,  JIANGLEI MA

发明人： SANJEEWA HERATH ,  JAVAD ABDOLI ,  JIANGLEI MA

IPC分类号： H04L25/02 ,  H04L5/00 ,  H04W76/11 ,  H04W68/00 ,  H04L1/00 ,  H04W72/04

摘要： Some embodiments of the present disclosure provide control signaling mechanisms to support data transmission by a user equipment (UE) that is in the RRC_INACTIVE state and, more generally, in any inactive state. Beyond simply supporting data transmission by a user equipment that is in the RRC_INACTIVE state, aspects of the present application provide mechanisms for configuring the UE for preamble transmission or sounding reference signal (SRS) transmission and for toggling between such transmissions. Aspects of the present application relate to mechanisms for enabling Timing Advance estimation, which mechanisms are not burdened with high overhead and which allow the UE to remain in the RRC_INACTIVE state.

公开(公告)号：US20210127450A1

公开(公告)日：2021-04-29

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 ,  H04W52/02 ,  H04W68/02 ,  H04W72/04

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：US20210127414A1

公开(公告)日：2021-04-29

申请号：US16664302

申请日：2019-10-25

申请人： JAVAD ABDOLI ,  SANJEEWA HERATH

发明人： JAVAD ABDOLI ,  SANJEEWA HERATH

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

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：US20210067392A1

公开(公告)日：2021-03-04

申请号：US16559865

申请日：2019-09-04

申请人： JAVAD ABDOLI ,  SANJEEWA HERATH ,  ALIREZA BAYESTEH

发明人： JAVAD ABDOLI ,  SANJEEWA HERATH ,  ALIREZA BAYESTEH

IPC分类号： H04L27/26

摘要： Aspects of the present application use a linear transformation of a sparse mapped single carrier transmission at a transmitter, for which a comparable inverse transform of the linear transform applied at the transmitter can be applied at the receiver. The linear transform reduces the sparsity of sparse mapped symbols. The use of the linear transform to reduce the sparsity enables peak-to-average power ratio (PAPR) and/or cubic metric to be reduced as compared to if the linear transform is not used. The linear transforms may be implemented in a block-wise manner, element-wise manner or combination thereof.