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公开(公告)号：US10999864B2
公开(公告)日：2021-05-04
申请号：US16806979
申请日：2020-03-02
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Zhifei Fan , Kapil Bhattad , Jing Sun , Tamer Kadous , Srinivas Yerramalli
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a base station may communicate in an unlicensed spectrum (e.g., a shared radio frequency spectrum band). As such, the UE may determine a codebook size for transmitting hybrid access request (HARQ) acknowledgement (ACK) feedback with respect to the unlicensed spectrum. Accordingly, the UE may base the HARQ ACK codebook size on a number of HARQ processes with which the UE has been configured. Additionally or alternatively, the UE may base the HARQ ACK codebook size on a number and/or duration of downlink channel monitoring occasions indicated by the base station. In some cases, the UE may base the HARQ ACK codebook size on a combination of the techniques described herein.
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102.发明申请公开(公告)号：US20200383106A1
公开(公告)日：2020-12-03
申请号：US16947797
申请日：2020-08-17
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Seyed Ali Akbar Fakoorian , Zhifei Fan , Jing Sun
Abstract: Wireless communications systems and methods related to multiplexing uplink control channel signals from different users are provided. A first wireless communication device obtains an uplink control channel multiplex configuration indicating a first frequency spreading sequence and at least one of a second frequency spreading sequence or a first spatial direction. The first wireless communication device communicates, with a second wireless communication device, a first uplink control channel signal including a first reference signal and a first uplink control information signal in a frequency spectrum based on the uplink control channel multiplex configuration. The first reference signal is based on the first frequency spreading sequence and the first uplink control information signal is based on at least one of the second frequency spreading sequence or the first spatial direction.
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公开(公告)号：US20200229179A1
公开(公告)日：2020-07-16
申请号：US16738739
申请日：2020-01-09
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Tao Luo , Xiaoxia Zhang , Arumugam Chendamarai Kannan , Jing Sun , Yan Zhou
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify, based at least in part on monitoring a set of channels for signals during a monitoring window, a subset of channels in which signals were detected during the monitoring window. The UE may select, based at least in part on the subset of channels, a format for a first sub-codebook and a second sub-codebook, the second sub-codebook indicating a feedback state for corresponding data transmissions received on the channels within the subset of channels. The UE may transmit the first uplink control message using a first sub-codebook, the first uplink control message identifying the format for the second sub-codebook and identifying the channels within the subset of channels. The UE may transmit a second uplink control message using the second sub-codebook according to the selected format.
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公开(公告)号：US20190327766A1
公开(公告)日：2019-10-24
申请号：US16263887
申请日：2019-01-31
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Jing Sun , Zhifei Fan , Yan Zhou , Tao Luo
IPC: H04W74/08 , H04L27/26 , H04B17/327 , H04L27/00
Abstract: Methods, systems, and devices for wireless communications are described that provide for aggregating random access requests across two or more physical random access channel (PRACH) occasions. Poor channel quality may inhibit the receipt of random access requests, and for user equipments (UEs) located in areas with relatively poor coverage, such aggregated random access requests may have an increased likelihood of successful receipt at a base station. The base station may configure a number of PRACH occasions to be available for aggregation of random access requests. A UE may receive PRACH configuration information from the base station, may aggregate a random access request across two or more PRACH occasions using the PRACH configuration information, and may transmit the aggregated random access request via the PRACH occasions. The base station may also configure one or more PRACH occasions to have a smaller subcarrier spacing for transmission of a random access request.
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公开(公告)号：US20190320433A1
公开(公告)日：2019-10-17
申请号：US16453864
申请日：2019-06-26
Applicant: Qualcomm Incorporated
Inventor： Sony Akkarakaran , Tao Luo , Xiaoxia Zhang , Zhifei Fan , Juan Montojo
Abstract: A method of wireless communication may include transmitting an uplink slot with a first control region, a second control region, and (e.g., optionally) a data region. Each region may include time resources and frequency resources. Transmitting the uplink slot may include transmitting the first control region in an earlier part of the uplink slot and transmitting the second control region (e.g., and the data region) in a later part of the uplink slot. The first control region may include time-critical control information and the second control region may include non-time-critical control information. A receiver receiving the uplink slot may receive the first control region before receiving the data region and the second control region.
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Patent Agency Ranking
公开(公告)号：US20190313260A1
公开(公告)日：2019-10-10
申请号：US16372917
申请日：2019-04-02
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Zhifei Fan , Jing Sun , Andrei Dragos Radulescu , Srinivas Yerramalli , Tamer Kadous
IPC: H04W16/26
Abstract: Wireless communications systems and methods related to on-demand cell coverage extension for broadcast signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first extended cell coverage request. The first wireless communication device communicates, with the second wireless communication device, a first broadcast communication signal in an extended cell coverage mode in response to the first extended cell coverage request. The first broadcast communication signal includes a system information block repeated in at least one of a time domain or a frequency domain.
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公开(公告)号：US10355760B2
公开(公告)日：2019-07-16
申请号：US15413539
申请日：2017-01-24
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Zhifei Fan , Dinkar Vasudevan , Juan Montojo
IPC: H04B7/0456 , H04L5/00 , H04L27/26 , H04B7/06
Abstract: Various aspects described herein relate to small cyclic delay diversity (SCDD) operation used in a wireless communication system (e.g., 5G New Radio). A method, a computer-readable medium, and an apparatus are provided. In an aspect, the method, computer-readable medium, or apparatus operates to identify a type of information for transmission, identify a rank associated with the type of information, and perform an SCDD precoding operation based at least in part on the identified type of information or the rank.
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公开(公告)号：US20190158333A1
公开(公告)日：2019-05-23
申请号：US16168629
申请日：2018-10-23
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Yongbin Wei , Tamer Kadous , Zhifei Fan , Jing Sun
IPC: H04L27/26 , H04L27/227 , H04W72/04 , H04L25/02
Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems, different wireless devices may communicate using different radio access technologies (RATs) in a shared radio frequency spectrum. Prior to communicating on a channel in the shared radio frequency spectrum, a wireless device may transmit a training field as part of a preamble in a transmission on the channel to reserve the channel for the transmission. As described herein, a training field transmitted by a wireless device using one RAT may be transmitted with an autocorrelation property associated with training fields of another RAT. As such, a wireless device configured to communicate using the other RAT may be able to receive and identify the training field (e.g., based on the autocorrelation property), and the wireless device may use the additional techniques described herein to determine an availability of the channel based on the training field.
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公开(公告)号：US20190110265A1
公开(公告)日：2019-04-11
申请号：US16216118
申请日：2018-12-11
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Juan Montojo , Jing Sun , Zhifei Fan
Abstract: Methods, systems, and devices for wireless communication are described. A base station may establish a transmission gap between downlink (DL) and uplink (UL) transmissions on a shared radio frequency (RF) spectrum band using time division duplex (TDD). The gap length may be based at least in part on a maximum allowed length of a filler signal corresponding to a coverage area of the base station. To reserve the shared band, a user equipment (UE) may communicate the filler signal for a length of time that is based at least in part on the maximum allowed length and a geographic distance between the UE and the base station. UEs farther from the base station transmit the filler signal of shorter lengths before sending an UL transmission, so that the UL transmissions from different UEs arrive at the same time at the base station regardless of the geographic distance between the UEs.
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公开(公告)号：US20190104548A1
公开(公告)日：2019-04-04
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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