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公开(公告)号：US11632193B2
公开(公告)日：2023-04-18
申请号：US16493364
申请日：2018-04-18
Applicant: Qualcomm Incorporated
Inventor： Changlong Xu , Jian Li , Chao Wei , Jing Jiang , Jilei Hou
Abstract: Methods, systems, and devices for wireless communication are described for dynamic frozen bits of polar codes for early termination and performance improvement. A wireless device may receive a signal comprising a codeword encoded using a polar code. The wireless device may perform decoding of the codeword including at least: parity check of a first subset of decoding paths for making a decision on early termination of decoding of the codeword based on dynamic frozen bits, and generating path metrics for a second subset of the decoding paths that each pass the parity check based on the dynamic frozen bits, and performing error detection on a bit sequence corresponding to one of the second subset of the decoding paths based at part on error detection bits and the generated path metrics. The wireless device may process the information bits based on a result of the decoding.
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公开(公告)号：US20220399924A1
公开(公告)日：2022-12-15
申请号：US17887958
申请日：2022-08-15
Applicant: QUALCOMM Incorporated
Inventor： Chenxi Hao , Juan Montojo , Yu Zhang , Chao Wei , Wanshi Chen
Abstract: The described techniques relate to improved methods, systems, devices, or apparatuses that support channel state information feedback for semi-open-loop and open-loop schemes. The described techniques provide for a user equipment (UE) to determine an open-loop, semi-open-loop, or closed-loop transmission scheme for deriving channel quality information (CQI). In the case of determined open-loop transmission scheme, the UE may select a transmission scheme corresponding to a time offset value and a precoder cycling granularity value. The UE may determine one or more of a time offset value, a precoder cycling granularity value, and a precoding matrix indicator (PMI) for a channel state information (CSI) report, and generate CQI accordingly. Additionally, the UE may include the determined values in the CSI report to indicate the transmission scheme used for the CQI derivation. Based on the CQI, the base station can then determine the transmission scheme and perform link adaption accordingly.
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公开(公告)号：US11516823B2
公开(公告)日：2022-11-29
申请号：US17250210
申请日：2019-06-06
Applicant: QUALCOMM Incorporated
Inventor： Chao Wei , Alberto Rico Alvarino , Le Liu , Umesh Phuyal , Wanshi Chen , Hao Xu
Abstract: Some techniques and apparatuses described herein allocate and/or transmit a narrower bandwidth value for LTE MTC UEs, such as UEs that operate in a small bandwidth mode using LTE procedures, and allocate and/or transmit a wider bandwidth value for 5G MTC UEs, such as UEs that can perform hopping and/or be allocated resources outside of a legacy bandwidth. For example, the wider bandwidth value may be associated with a non-LTE carrier (e.g., a 5G carrier in a 5G bandwidth) with the same center frequency as an LTE carrier associated with the narrower bandwidth value. Some techniques and apparatuses described herein provide for initial access, signaling, paging, random access, unicast communications, frequency hopping, cell-specific reference signaling, narrowband alignment, and/or other coexistence considerations for LTE MTC UEs operating on an LTE carrier and 5G MTC UEs operating on a non-LTE carrier with a bandwidth that includes the LTE carrier.
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公开(公告)号：US11483107B2
公开(公告)日：2022-10-25
申请号：US16467872
申请日：2018-01-06
Applicant: QUALCOMM Incorporated
Inventor： Yu Zhang , Chao Wei , Hao Xu , Wanshi Chen , Wei Zeng
Abstract: Certain aspects of the present disclosure relate to methods and apparatus for transmitting sounding reference signals (SRS) in communications systems operating according to new radio (NR) technologies. An exemplary method that a user equipment (UE) may perform includes determining whether to transmit a sounding reference signal (SRS) using a discrete Fourier transform (DFT) spread orthogonal frequency domain multiplexing (DFT-S-OFDM) waveform or a cyclic prefix orthogonal frequency domain multiplexing (CP-OFDM) waveform, and transmitting the SRS using the determined waveform.
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公开(公告)号：US11470598B2
公开(公告)日：2022-10-11
申请号：US17044709
申请日：2019-04-02
Applicant: QUALCOMM Incorporated
Inventor： Changlong Xu , Chao Wei , Liangming Wu , Peng Cheng , Kai Chen , Hao Xu , Tingfang Ji
Abstract: Aspects of the disclosure relate to wireless communication. In some aspects, a user equipment (UE) may receive an indicator, in a physical downlink control channel (PDCCH) payload, that indicates whether the PDCCH payload includes data or downlink control information (DCI) for obtaining the data, wherein the indicator is an initial state of a cyclic redundancy check that includes a predefined sequence of bits; and obtain at least one of the data or the DCI based at least in part on the indicator. Numerous other aspects are provided.
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Patent Agency Ranking
公开(公告)号：US11432176B2
公开(公告)日：2022-08-30
申请号：US16638213
申请日：2018-08-10
Applicant: Qualcomm Incorporated
Inventor： Chenxi Hao , Yu Zhang , Liangming Wu , Chao Wei , Wanshi Chen , Hao Xu
Abstract: Some wireless communication networks may improve communication reliability and/or throughput using multiple-input, multiple-output (MIMO) schemes. MIMO operation may in turn be supported by the use of channel state information reference signals (CSI-RS), which may allow communicating devices to estimate and leverage multipath channel conditions. However, the signaling used to support such communications may consume significant resources. In accordance with the described techniques, a user equipment (UE) may identify non-zero-power beams based on received CSI-RS. The non-zero-power beams may contribute to the final precoding vector. Rather than transmitting beam coefficients relating to zero-power beams, the UE may instead indicate a presence of these zero-power beams to the base station (e.g., by indicating a number of non-zero-power beams). Such techniques may reduce overhead of the communications or otherwise benefit the system.
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公开(公告)号：US11418302B2
公开(公告)日：2022-08-16
申请号：US16608328
申请日：2018-06-08
Applicant: Qualcomm Incorporated
Inventor： Chenxi Hao , Yu Zhang , Liangming Wu , Chao Wei , Wanshi Chen
Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for communicating an uplink grant and a channel state information reference signal (CSI-RS) trigger. A wireless device may identify a pending collision for a slot of a carrier between a CSI-RS and uplink data. The wireless device may determine a communication configuration for the CSI-RS and the uplink data such that no collision occurs. The determined communication configuration for the CSI-RS may include delaying one of the colliding signals, transmitting only one of the colliding signals and suppressing the other, or reconfiguring the slot such that both signals can be transmitted successfully. Additionally, the UE and the base station may determine a CSI reporting configuration based on the determined communication configuration.
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公开(公告)号：US11356989B2
公开(公告)日：2022-06-07
申请号：US16615534
申请日：2018-06-15
Applicant: QUALCOMM Incorporated
Inventor： Yu Zhang , Chao Wei , Liangming Wu , Wanshi Chen
Abstract: Reporting aperiodic channel state information (A-CSI) via a physical uplink control channel (PUCCH) is disclosed. A UE receives a configuration to report aperiodic channel state information (A-CSI) using physical uplink control channel (PUCCH). The UE can report lightweight A-CSI via short/long PUCCH or may report heavy A-CSI via short/long PUCCH. The UE receives a trigger signal for PUCCH-based A-CSI reporting either by a dedicated downlink grant or by a group common DCI. When triggered via a DCI-based trigger, the PUCCH resource can be either a resource used for HARQ-ACK feedback, e.g., short PUCCH; or a semi-static configured PUCCH resource, e.g., either short PUCCH or long PUCCH. When triggered via a group common DCI-based trigger, the PUCCH resource can be either semi-statically configured, or dynamically indicated.
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公开(公告)号：US11350462B2
公开(公告)日：2022-05-31
申请号：US16630180
申请日：2018-08-21
Applicant: QUALCOMM Incorporated
Inventor： Peng Cheng , Chao Wei
Abstract: NPRACH suffers from false alarms in which a base station detects and cannot distinguish an NPRACH signal that is intended for a different base station. An NPRACH may include a cell specific frequency shift pattern over repetitions and/or a repetition level scrambling sequence that enables a base station to more accurately detect NPRACH. An apparatus generates an NPRACH signal comprising multiple repetitions, wherein each repetition comprises multiple symbol groups. The apparatus may apply a different frequency shift between repetitions of the NPRACH signal. The frequency shift may comprise a cell specific random frequency shift pattern applied over each repetition. The apparatus may apply a repetition level scrambling sequence to the NPRACH signal, wherein a single scrambling sequence is applied to a set of repetitions comprised in the NPRACH signal. The apparatus transmits the NPRACH to a serving cell.
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公开(公告)号：US11336344B2
公开(公告)日：2022-05-17
申请号：US17092764
申请日：2020-11-09
Applicant: QUALCOMM Incorporated
Inventor： Chao Wei , Wanshi Chen , Peter Gaal , Hao Xu , Neng Wang , Xiaohui Liu , Jilei Hou
IPC: H04B7/06 , H04B7/0456 , H04L5/00 , H04L27/26
Abstract: Design of precoding and feedback for user equipment (UE)-specific reference signals (UE-RS)-based open-loop and semi-open-loop multiple input, multiple output (MIMO) systems is discussed. Aspects of the present disclosure provide for sub-resource block (RB) random precoding that allows for greater diversity gain in a lower bandwidth. In addition, the recoding may be performed using resource element (RE)-level layer shifting that provides for a number of precoders to be assigned to a number of layers for every such continuous subcarrier. As such, two codewords may experience the same effective channel quality with channel quality indicators (CQI) being averaged across all of the layers.
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