公开(公告)号：US20180212810A1

公开(公告)日：2018-07-26

申请号：US15674428

申请日：2017-08-10

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Sony Akkarakaran ,  Wei Zeng ,  Peter Gaal ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Tao Luo ,  Tingfang Ji

IPC: H04L27/26 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described that support frequency and time domain multiplexing for low peak-to-average waveforms with multiple streams. A user equipment (UE) may identify sets of symbols associated with different streams (e.g., multiple single-carrier discrete Fourier transform (DFT)-spread waveforms), where each stream may be associated with a low peak-to-average power ratio (PAPR). In some cases, different waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM). The UE may further reduce the PAPR of the multiplexed waveforms by performing time division multiplexing (TDM) across the single-carrier streams, and sets of symbols that are not used by one waveform may be used by another waveform. Frequency domain phase ramps may be applied to align the multiplexed waveforms. Signals included in an uplink transmission according to these techniques may maintain properties similar to single-carrier waveforms, including a low PAPR.

公开(公告)号：US10028240B2

公开(公告)日：2018-07-17

申请号：US15445572

申请日：2017-02-28

Applicant: QUALCOMM Incorporated

Inventor： Tingfang Ji ,  Gavin Bernard Horn ,  John Edward Smee ,  Joseph Binamira Soriaga ,  Naga Bhushan ,  Jing Jiang ,  Kambiz Azarian Yazdi ,  Peter Pui Lok Ang ,  Peter Gaal ,  Krishna Kiran Mukkavilli ,  Alexei Yurievitch Gorokhov

IPC: H04W56/00 ,  H04W48/14 ,  H04L5/00 ,  H04W4/06 ,  H04W8/00

Abstract: Methods, systems, and devices are described for wireless communication. In one method, a method of wireless communication at a user equipment (UE) includes receiving a synchronization signal. The synchronization signal may be common to a plurality of cells within a network. The method further includes acquiring a timing of the network based on the synchronization signal, and transmitting a pilot signal in response to acquiring the timing of the network. The pilot signal may identify the UE and be concurrently receivable by the plurality of cells within the network. Other aspects, features, and embodiments are also claimed and described.

公开(公告)号：US10009160B2

公开(公告)日：2018-06-26

申请号：US14938790

申请日：2015-11-11

Applicant: QUALCOMM Incorporated

Inventor： Jing Jiang ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Krishna Kiran Mukkavilli ,  John Edward Smee

IPC: H04W4/00 ,  H04L5/00 ,  H04L1/18 ,  H04B7/08 ,  H04W72/04 ,  H04L1/00 ,  H04L25/03

CPC classification number: H04L5/0055 ,  H04B7/086 ,  H04L1/0035 ,  H04L1/0052 ,  H04L1/1812 ,  H04L1/1858 ,  H04L25/03834 ,  H04W72/0453

Abstract: A system and method for low latency acknowledgements includes a communication unit that includes a processor, a transmitter coupled to the processor, and a receiver coupled to the processor. The communication unit is configured to transmit a message to another communication unit, receive a first group of one or more repetitions of an acknowledgement signal from the another communication unit, and decode the acknowledgement signal prior to fully receiving a last repetition of a second group of one or more repetitions of the acknowledgement signal. The acknowledgement signal has a partially decodable structure. In some embodiments, each of the are repetitions of a same time domain waveform received during one symbol period. In some embodiments, a frequency domain characteristic of the time domain waveform consists of one non-zero tone for every K tones, K being equal to a sum of a number of repetition in the first and second groups.

公开(公告)号：US20180167252A1

公开(公告)日：2018-06-14

申请号：US15851180

申请日：2017-12-21

Applicant: QUALCOMM Incorporated

Inventor： Renqiu WANG ,  Hao Xu ,  Jing Jiang ,  Yi Huang ,  Wei Zeng ,  Wanshi Chen ,  Tingfang Ji

IPC: H04L27/26 ,  H04B7/0404 ,  H04B7/06

CPC classification number: H04L27/2646 ,  H04B7/0404 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/061 ,  H04B7/0634 ,  H04B7/0669 ,  H04B7/0671 ,  H04J13/12 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2636

Abstract: A configurable new radio (NR) uplink (UL) transmission may use transmit diversity. A user equipment (UE) may identify an uplink transmission of at least one stream as using one of cyclic prefix orthogonal frequency division multiplexing or discrete Fourier transform spread orthogonal frequency division multiplexing. The UE may apply a precoding matrix to the at least one identified stream. The precoding matrix changes over time. The precoding matrix may change based on closed loop feedback, a precoding cycling pattern, and/or a code division multiplexing group. The UE may transmit the at least one identified stream from multiple antennas according to the applied precoding matrix.

公开(公告)号：US09985802B2

公开(公告)日：2018-05-29

申请号：US14705787

申请日：2015-05-06

Applicant: QUALCOMM Incorporated

Inventor： Jing Jiang ,  Krishna Kiran Mukkavilli ,  Naga Bhushan ,  Tingfang Ji ,  Joseph Binamira Soriaga ,  Peter Gaal ,  John Edward Smee ,  Alexei Yurievitch Gorokhov

IPC: H04L25/02 ,  H04W72/04 ,  H04L12/801 ,  H04L5/00

CPC classification number: H04L25/0226 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0058 ,  H04L5/0082 ,  H04L5/0096 ,  H04L47/12 ,  H04W72/0446

Abstract: The disclosure relates in some aspects to techniques for improved channel estimation. For example, a device can specify a pilot structure where pilot density differs over time. As another example, a device can indicate that a pilot from a prior transmission time interval (TTI) can be used for channel estimation. As another example, a device can employ frequency domain physical resource block (PRB) bundling with the bundling information signaling. As yet another example, a device can use an adjustable traffic-to-pilot ratio (TPR) for throughput optimization. Other aspects, embodiments, and features are also discussed and claimed.

公开(公告)号：US20180139713A1

公开(公告)日：2018-05-17

申请号：US15806210

申请日：2017-11-07

Applicant: QUALCOMM Incorporated

Inventor： Heechoon Lee ,  Hung Ly ,  Tingfang Ji ,  Haitong Sun ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu

IPC: H04W56/00

CPC classification number: H04W56/0005 ,  H04J11/0083 ,  H04L5/0007 ,  H04L5/005 ,  H04L5/0092 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2692

Abstract: Split synchronization signal configuration for unified synchronization channels and techniques for indicating communication block boundaries in wireless communication systems that use a unified synchronization signal configuration that may be used in different communication modes are described. The disclosed split synchronization signal configuration allows the same synchronization signal configuration to be used in different communication modes (or numerologies) that operate on different frequencies. The boundary indication techniques of embodiments allow efficient indication of the beginning of a communication block (such as a frame, subframe, or slot) relative to the beginning of a unified synchronization signal configuration.

公开(公告)号：US20180131479A1

公开(公告)日：2018-05-10

申请号：US15621302

申请日：2017-06-13

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Jing Sun ,  Tingfang Ji ,  Peter Gaal

IPC: H04L5/00 ,  H04L1/00 ,  H04W72/04

Abstract: Efficient handling of control subbands in multiple component carrier (CC) configurations is discussed. A user equipment (UE) may begin monitoring one narrowband control subband within a wider band CC. At various times, the UE may receive a dynamic activation signal that triggers the UE to begin monitoring at least another control subband. Dependent on a type of traffic state the UE is operating, when currently involved in wideband operations, the UE may be triggered to monitor one or more UE-specific control subbands within the same slot in the wider band CC.

公开(公告)号：US09967122B2

公开(公告)日：2018-05-08

申请号：US15271825

申请日：2016-09-21

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Wei Zeng ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04L27/26

CPC classification number: H04L27/2605 ,  H04L27/2602 ,  H04L27/2628 ,  H04L27/2636 ,  H04L27/265

Abstract: Aspects of the present disclosure provide systems, methods, and apparatuses for implementing the multiplexing of different orthogonal frequency-division multiplexing (OFDM) waveforms using a transmitter and receiver configured to process different types of signals without a need for distinct hardware structures. In one example, aspects of the present disclosure may include a transmitter configured to transmit both a first type of discrete fourier transform (DFT)-spread OFDM waveform and a second type of DFT-spread OFDM waveform that may be multiplexed over the wireless channel. In some aspects, the transmitter may modify the numerology of the zero-tail DFT-spread OFDM waveform to match the numerology of other OFDM waveforms (e.g., OFDM waveform with zero-guard or a single carrier DFT-spread OFDM with zero-guard).

公开(公告)号：US09949292B2

公开(公告)日：2018-04-17

申请号：US14480553

申请日：2014-09-08

Applicant: QUALCOMM Incorporated

Inventor： Naga Bhushan ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Peter Gaal ,  Durga Prasad Malladi

IPC: H04W72/02 ,  H04B7/00 ,  H04J3/00 ,  H04W74/08 ,  H04W36/22 ,  H04L5/00

CPC classification number: H04W74/08 ,  H04L5/0091 ,  H04W36/22 ,  H04W74/0808

Abstract: Methods, systems, and devices are described contention-based channel access procedures that may enhance efficiency in communications using unlicensed spectrum. A time period may be identified during which base stations perform contention-based downlink channel access procedures for access to a channel in an unlicensed spectrum. The base stations may be coordinated such that different base stations may seek channel access during different time intervals during the time period. Contention-based uplink channel access procedures for UEs may then be modified to favor one or more UEs that are associated with a base station that has won channel access.

公开(公告)号：US20180098361A1

公开(公告)日：2018-04-05

申请号：US15712761

申请日：2017-09-22

Applicant: QUALCOMM Incorporated

Inventor： Tingfang Ji ,  Joseph Binamira SORIAGA ,  Peter GAAL ,  Jing JIANG ,  John SMEE

IPC: H04W74/08 ,  H04L12/701

CPC classification number: H04W74/0866 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0092 ,  H04L45/00

Abstract: Wireless communications systems, methods, and techniques related to signaling and determining slot and mini-slot structures are provided. A first wireless communication device transmits a first signal according to a first numerology including at least a first tone spacing. The first signal indicates a second numerology including at least a second tone spacing. The first wireless communication device transmits a second signal according to the second numerology. The first signal includes a physical broadcast channel (PBCH) signal. The second numerology is independent from the first numerology. Different slot/mini-slot structures may be utilized for varying channel types to support mixed numerology arrangements. Embodiments may utilize single and varied slot structures; single slot structures may be decoupled from transmission numerology and varied slot structures may be defined based on reference numerology. Other aspects, embodiments, and features are also claimed and described.