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公开(公告)号：US10965424B2
公开(公告)日：2021-03-30
申请号：US16241660
申请日：2019-01-07
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Xiaoxia Zhang , Jing Sun , Tamer Kadous , Qingjiang Tian
Abstract: Methods, systems, and devices for wireless communications are described. One method may include receiving, by a user equipment (UE) from a base station, a resource allocation indicator corresponding to a total number of resource elements to allocate for uplink control information within a resource allocation of a shared data channel. The UE may determine anchor resources within the resource allocation, and determine a plurality of transmission parameters for an autonomous uplink transmission based on the total number of resource elements. The UE may transmit, to the base station, the uplink control information within the anchor resources to indicate the plurality of transmission parameters for the autonomous uplink transmission.
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公开(公告)号：US10892864B2
公开(公告)日：2021-01-12
申请号：US15460079
申请日：2017-03-15
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Zhifei Fan , Weiliang Zeng , Jing Sun , Juan Montojo
IPC: H04L5/00 , H04L27/26 , H04L5/02 , H04J13/00 , H04B17/336
Abstract: Methods, systems, and devices for wireless communication are described. A base station may multiplex reference signal (RS) transmissions for different antenna ports over a set of resource elements using a code division multiplexing (CDM) group spreading in a time dimension and a frequency dimension. The base station may transmit the RS transmissions over the set of resource elements based at least in part on the multiplexing to a user equipment (UE). The UE may demultiplex the RS transmissions based at least in part on a CDM group and may select at least one of the time dimension or the frequency dimension over which to demultiplex the RS transmissions based on a determination or other information.
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公开(公告)号：US10887941B2
公开(公告)日：2021-01-05
申请号：US15240040
申请日：2016-08-18
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Zhifei Fan , Jing Sun , Juan Montojo , Siddhartha Mallik , Aleksandar Damnjanovic , Xiaoxia Zhang
Abstract: Techniques are described for wireless communication. One method includes receiving, in a downlink portion of a transmission structure on a shared radio frequency spectrum band, an uplink grant for an uplink data portion of the transmission structure. The transmission structure includes the downlink portion, followed by and time domain multiplexed with an uplink control portion, followed by and time domain multiplexed with the uplink data portion. The method also includes retaining access to the shared radio frequency spectrum band by transmitting an unscheduled transmission during the uplink control portion of the transmission structure.
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公开(公告)号：US20200228174A1
公开(公告)日：2020-07-16
申请号：US16736778
申请日：2020-01-07
Applicant: QUALCOMM Incorporated
Inventor： Wooseok Nam , Zhifei Fan , Tao Luo , Xiaoxia Zhang , Jing Sun , Arumugam Chendamarai Kannan
IPC: H04B7/0456 , H04B7/0452 , H04L1/18 , H04W72/04 , H04L5/00
Abstract: Methods, systems, and devices for wireless communications are described. A size of a hybrid automatic repeat request (HARQ)-acknowledgment (ACK) codebook may be determined and indicated when the HARQ-ACK codebook is transmitted. For example, a user equipment (UE) may transmit a number of information bits within a HARQ-ACK codebook, and may further indicate a size of the HARQ-ACK codebook based on the number of information bits. The UE may transmit the indication of the size of the HARQ-ACK codebook on the same or different time/frequency resources as the HARQ-ACK codebook, using a particular field, using a different uplink channels, or the like. Additionally or alternatively, the UE may indicate the size of the HARQ-ACK codebook using a particular pattern or sequence of reference signals associated with the channel used to carry the HARQ-ACK codebook.
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公开(公告)号：US10716146B2
公开(公告)日：2020-07-14
申请号：US16144754
申请日：2018-09-27
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Xiaoxia Zhang
Abstract: A universal Channel Reservation Signal (CRS) is transmitted by a wireless network node on a frequency channel upon successful Clear Channel Assessment (CCA). The channel reservation signal includes a preamble that has a predetermined pattern, a message having a same short period waveform as the preamble, and a synchronization field (SYNC) disposed between the preamble and the message. The message is encoded to prevent any and all occurrences therein of at least one of the predetermined pattern or a combination of the predetermined pattern and at least part of the SYNC. The universal CRS can be transmitted and successfully received and processed by both NR-SS devices and devices of at least one other wireless communication protocol having a different numerology, such as WiFi. Thus, information can be shared and used to avoid transmitting or to reduce or avoid collisions and interference between devices of different RATs.
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Patent Agency Ranking
公开(公告)号：US10609714B2
公开(公告)日：2020-03-31
申请号：US16031869
申请日：2018-07-10
Applicant: QUALCOMM Incorporated
Inventor： Seyed Ali Akbar Fakoorian , Xiaoxia Zhang , Taesang Yoo , Zhifei Fan
IPC: H04W72/08 , H04B7/0426 , H04B7/08 , H04B7/0456 , H04L5/00
Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit a precoded reference signal to prevent interference with an incoming signal from a base station. The UE may determine a precoder for the reference signal based at least in part on a whitening matrix. In some examples, the UE may determine the precoder based at least in part on the whitening matrix and an effective channel between the base station and the UE. The precoded reference signal may be used by devices in other wireless communications systems to avoid interfering with a signal being received by the UE. In some examples, the UE may alternatively or additionally transmit an indication of the number of additional layers of the link between the UE and the base station that may be nulled out for a second link.
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公开(公告)号：US10588159B2
公开(公告)日：2020-03-10
申请号：US15976301
申请日：2018-05-10
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Taesang Yoo , Seyed Ali Akbar Fakoorian , Zhifei Fan
IPC: H04L5/12 , H04W74/08 , H04B7/0456 , H04B7/0417 , H04B7/06 , H04W72/10
Abstract: Consideration of contention windows with spatial listen before talk (LBT) operations is discussed. In multiple input, multiple output (MIMO) transmission operations over a shared transmission medium, use of spatial LBT transmissions may be implemented with fairness options and parameters influenced by a condition of the MIMO transmitter, such conditions as the level of MIMO capability or the enablement of polite spatial LBT nulling transmissions. When a MIMO transmitter identifies data for transmission, it may determine a configuration of the medium access contention operation, synchronous or asynchronous content, based on the condition of the MIMO transmitter. The MIMO transmitter may then transmit the data either using spatial LBT transmission or not according to the configuration of the medium access contention operation.
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公开(公告)号：US20200068625A1
公开(公告)日：2020-02-27
申请号：US16522537
申请日：2019-07-25
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Jing Sun , Kapil Bhattad , Zhifei Fan
Abstract: Physical Random Access Channel (PRACH) interlacing is disclosed. In a particular implementation, a method of performing wireless communications adjusting, by a user equipment (UE) based on a cyclic prefix (CP) length of a received Physical Random Access Channel (PRACH) configuration, CP length of one or more uplink channels to match the CP length of the PRACH configuration. The method additionally includes transmitting, by the UE, the one or more uplink channels interlaced with a PRACH channel that corresponds to the PRACH configuration. The PRACH channel and the one or more uplink channels are aligned.
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公开(公告)号：US10477592B2
公开(公告)日：2019-11-12
申请号：US15813811
申请日：2017-11-15
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Tao Luo , Taesang Yoo , Juan Montojo , Zhifei Fan
Abstract: Systems and methods herein determine whether an uplink RACH request and/or an uplink autonomous message will be sent using Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), or another waveform. The determinations may be based on carrier frequencies, path loss measurements, preconfigurations, and/or more. Further, the systems and methods may send the uplink using time and/or frequency resources that correspond to the DFT-S-OFMD waveform, CP-OFDM waveform, or other waveform. Other aspects, embodiments, and features are also claimed and described.
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公开(公告)号：US10470242B2
公开(公告)日：2019-11-05
申请号：US15637457
申请日：2017-06-29
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Juan Montojo , Taesang Yoo , Zhifei Fan
Abstract: Phase compensation in a new radio (NR) shared spectrum (NR-SS) coordinated multipoint (CoMP) environment is discussed. A base station may synchronize the phase between one or more additional base stations in a coordinated multipoint (CoMP) group serving one or more user equipments (UEs). This first synchronizing is performed prior to a current transmission opportunity between the CoMP group and the UEs. During transmission, a UE will sent a phase compensation reference signal (PCRS) to help with adjusting a phase drift that exceeds a predetermined threshold. The PCRS may be triggered by a signal from the base station or may be sent routinely by the UE. The UEs will transmit PCRS after each subframe, which the base stations use to adjust the phase.
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