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公开(公告)号：US10356770B2
公开(公告)日：2019-07-16
申请号：US15258445
申请日：2016-09-07
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Jing Sun , Xiaoxia Zhang , Juan Montojo
Abstract: Techniques are described for wireless communication. A method for wireless communication at a base station includes determining a set of physical downlink control channels (PDCCHs) to be transmitted in a control region; transmitting an enhanced physical control format indicator channel (ePCFICH) identifying a quantity of PDCCHs in the set of PDCCHs associated with each aggregation level of at least one aggregation level, and a size of the control region; and transmitting the set of PDCCHs in the control region on a component carrier deployed in a radio frequency spectrum band. A method for wireless communication at a user equipment (UE) device includes receiving the ePCFICH; receiving the control region; and searching for at least one PDCCH within the control region based at least in part on receiving the ePCFICH.
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公开(公告)号：US10356626B2
公开(公告)日：2019-07-16
申请号：US15636372
申请日：2017-06-28
Applicant: QUALCOMM Incorporated
Inventor： Juan Montojo , Taesang Yoo , Xiaoxia Zhang , Aleksandar Damnjanovic , Siddhartha Mallik
Abstract: Wireless communications systems and methods related to reclaiming of resources in a shared frequency spectrum shared by multiple operators are provided. A first wireless communication device associated with a first operator of a plurality of operators identifies a transmission opportunity in a shared frequency spectrum shared by the plurality of operators, wherein the first operator has priority among the plurality of operators for accessing the shared frequency spectrum in the transmission opportunity. The first wireless communication device communicates with a second wireless communication device associated with the first operator, in the transmission opportunity without a prior reservation of the transmission opportunity.
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公开(公告)号：US10334447B2
公开(公告)日：2019-06-25
申请号：US15042491
申请日：2016-02-12
Applicant: QUALCOMM Incorporated
Inventor： Madhavan Srinivasan Vajapeyam , Jelena Damnjanovic , Aleksandar Damnjanovic , Tao Luo , Jing Sun , Taesang Yoo , Yongbin Wei
Abstract: Methods, systems, and devices for wireless communication are described. Discontinuous reception (DRX) operation may be configured differently on enhanced component carriers (eCCs) than on other component carriers, including a primary cell (PCell). In some cases, a user equipment (UE) may be configured with several different eCC DRX modes. An eCC DRX configuration may, for example, be coordinated with downlink (DL) transmission time interval (TTI) scheduling so each DRX ON duration may correspond to a DL burst duration of the corresponding eCC. The eCC DRX ON durations may also be scheduled according to hybrid automatic repeat request (HARD) process scheduling. In some examples, eCC DRX ON durations may be based on listen-before-talk (LBT) procedures. In some cases, eCC DRX ON durations may be configured to contain an uplink (UL) burst to enable channel state information (CSI) reporting. The eCC DRX may also be configured to minimize interruption of the PCell.
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公开(公告)号：US10333595B2
公开(公告)日：2019-06-25
申请号：US15932312
申请日：2018-02-16
Applicant: QUALCOMM Incorporated
Inventor： Seyed Ali Akbar Fakoorian , Xiaoxia Zhang , Taesang Yoo , Siddhartha Mallik , Juan Montojo
Abstract: Reference signal and transmitter (Tx)/receiver (Rx) precoding for user equipment (UE) multiplexing in new radio (NR) shared spectrum networks is discussed. In certain reference signals, a base station may schedule multiple UEs for transmission of uplink reference signals within an identified subframe. The base station may transmit a reference signal configuration message, wherein the reference signal configuration message includes a transmission sequence identifier identifying a multiplexing for antenna ports assigned for transmission of the uplink reference signals. The multiplexing may be one or both of frequency divisional multiplexing (FDM) and time division multiplexing (TDM) over the identified subframe. Additional reference signals, transmit precoders may be identified by the base station based on channel inversion calculations of the channel matrix determined based on uplink reference signals.
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公开(公告)号：US20190174532A1
公开(公告)日：2019-06-06
申请号：US16245802
申请日：2019-01-11
Applicant: QUALCOMM Incorporated
Inventor： Jelena Damnjanovic , Taesang Yoo , Siddhartha Mallik , Aleksandar Damnjanovic , Arumugam Chendamarai Kannan , Madhavan Srinivasan Vajapeyam , Durga Prasad Malladi , Yongbin Wei , Tao Luo
Abstract: Methods, systems, and devices for wireless communication are described. A base station may employ a multiplexing configuration based on latency and efficiency considerations. The base station may transmit a resource grant, a signal indicating the length of a downlink (DL) transmission time interval (TTI), and a signal indicating the length of a subsequent uplink (UL) TTI to one or more user equipment (UEs). The base station may dynamically select a new multiplexing configuration by, for example, setting the length of an UL TTI to zero or assigning multiple UEs resources in the same DL TTI. Latency may also be reduced by employing block feedback, such as block hybrid automatic repeat request (HARQ) feedback. A UE may determine and transmit HARQ feedback for each transport block (TB) of a set of TBs, which may be based on a time duration of a downlink TTI.
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Patent Agency Ranking
536.发明授权公开(公告)号：US10305537B2
公开(公告)日：2019-05-28
申请号：US15975480
申请日：2018-05-09
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Taesang Yoo
IPC: H04L7/06 , H04B1/7075 , H04L27/26 , H04W56/00
Abstract: Over-the-air phase synchronization for reciprocity-based coordinated multipoint (CoMP) joint transmission is discussed. The base stations of the CoMP group and served user equipment (UEs) transmit phase synchronization reference signals (PSRS). The receiving nodes compute wideband co-phasing values representing the phase difference between pairs of the PSRS over each tone of a whole spectrum band, and slope values based on the per-tone co-phasing values. The UEs feedback the wideband downlink co-phasing value and the downlink slope value. The base stations of the CoMP group determine a phase compensation based on the differences between the slope value calculated by the base station and the slope value reported by the UE, and based on the differences between the wideband co-phasing value calculated by the base station and the wideband co-phasing value reported by the UE. The base station uses the phase compensation to adjust communications by the base stations in the CoMP group.
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公开(公告)号：US20190150198A1
公开(公告)日：2019-05-16
申请号：US16183367
申请日：2018-11-07
Applicant: QUALCOMM Incorporated
Inventor： Jing Sun , Xiaoxia Zhang , Taesang Yoo , Tamer Kadous , Yongbin Wei , Aleksandar Damnjanovic
Abstract: New radio (NR) transmission opportunity (TxOP) structure having flexible starting points are disclosed for wireless communications. When a typical listen before talk (LBT) procedure is performed, the transmitting node will not know ahead of time when the LBT will pass and, thus, when data transmissions can start. NR systems may include a mini-slot design for accommodating transmission units smaller than a slot. Aspects of the present disclosure provide for flexibly increasing the number of potential starting transmission boundaries depending on when the LBT pass is detected. Alternative aspects of the present disclosure determine the potential starting transmission points using a mini-slot based design, a floating slot based design, or a punctured slot based design with a code block group (CBG) level retransmission mechanism.
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公开(公告)号：US10285117B2
公开(公告)日：2019-05-07
申请号：US15143821
申请日：2016-05-02
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Hao Xu , Durga Prasad Malladi , Yongbin Wei , Siddhartha Mallik , Jing Sun , Madhavan Srinivasan Vajapeyam , Jun Wang , Tao Luo , Xiaoxia Zhang , Wanshi Chen , Aleksandar Damnjanovic
Abstract: Techniques are described for wireless communication. One method for wireless communication at a base station includes contending for access to a shared channel of a shared radio frequency spectrum band, and multiplexing first component carrier (CC) communication windows and second CC communication windows in the shared channel. A duration of orthogonal frequency domain multiplexed (OFDM) symbols of the first CC communication windows may be different from a duration of OFDM symbols of the second CC communication windows, and the multiplexing may occur on the shared channel upon winning contention for access to the shared channel. One method for wireless communication at a user equipment (UE) includes monitoring a shared channel of a shared radio frequency spectrum band for a first CC Listen Before Talk (LBT) frame, and receiving, in a second CC preamble, an indication of the first CC LBT frame.
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公开(公告)号：US10200874B2
公开(公告)日：2019-02-05
申请号：US15642384
申请日：2017-07-06
Applicant: QUALCOMM Incorporated
Inventor： Jing Sun , Taesang Yoo , Xiaoxia Zhang , Sanaz Barghi , Juan Montojo
Abstract: Aspects of the disclosure relate to wireless communication systems configured to share a shared spectrum with one or more other systems (e.g., other operator networks utilizing the same radio access technology, and/or other networks utilizing different radio access technologies). Coexistence between the different systems on the shared spectrum may be provided by utilizing a technology-neutral signature waveform such as a signature sequence. A device or system may monitor a shared spectrum channel for the signature waveform, and when detected, may determine whether the shared spectrum is available for that system, or busy as occupied by another system. When the shared spectrum channel is idle, the device or system may reserve the channel by transmitting the signature waveform. Other aspects, embodiments, and features are also claimed and described.
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公开(公告)号：US20190037482A1
公开(公告)日：2019-01-31
申请号：US16045414
申请日：2018-07-25
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Andrei Dragos Radulescu , Tamer Kadous , Jing Sun , Xiaoxia Zhang , Taesang Yoo
Abstract: A discovery measurement timing configuration (DMTC) window reservation signal is disclosed for new radio (NR) shared spectrum (NR-SS) networks. The DMTC window is defined providing a reserved location for transmission of essential control signaling and potentially high priority traffic that may be transmitted in a prioritized manner. Access within the DMTC window may be provided with a clear channel assessment (CCA) exempt transmission (CET) option or a non-CET option. When the CET option is used, the reservation duration and period may be conveyed through the channel reservation signal. User equipments (UEs) that detect the reservation signal may re-transmit with added offset to inform neighboring base station that may not be within range of the serving base station. Base station that receive either the transmitted or re-transmitted reservation signal will refrain from communications that may interfere with the reception at the UEs.
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