公开(公告)号：US11272551B2

公开(公告)日：2022-03-08

申请号：US16545334

申请日：2019-08-20

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Xiao Feng Wang ,  Hao Xu

IPC: H04J3/00 ,  H04W74/08 ,  H04W74/06 ,  H04W72/04 ,  H04W72/12 ,  H04W4/70

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and more specifically to transmission resource management for ordered physical random access channel (PRACH) signals. An example method performed by a base station generally includes providing an indication of a set of transmission resources, within a narrowband region of a wider system bandwidth, for transmitting scheduled physical random access channel (PRACH) signals by a first user equipment (UE) and transmitting a command to the first UE to transmit a scheduled PRACH.

公开(公告)号：US11272468B2

公开(公告)日：2022-03-08

申请号：US16781544

申请日：2020-02-04

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Hao Xu ,  Peter Gaal ,  Xiaofeng Wang ,  Wanshi Chen ,  Yongbin Wei ,  Juan Montojo ,  Alberto Rico Alvarino

IPC: H04W56/00 ,  H04L5/00 ,  H04J13/00 ,  H04W16/32 ,  H04L27/26 ,  H04W88/08 ,  H04W88/12

Abstract: Aspects of the present disclosure provide techniques for design of synchronization signals for narrowband operation and other clean-slate, OFDM based systems such as enhanced component carrier (eCC) systems. An example method is provided for operations which may be performed by a BS to generate and transmit a dual-layer PSS, and correspondingly, techniques for a UE to detect the dual-layer PSS. The PSS may be generated utilizing a binary code cover and at least one sequence applied to a number of symbols within one or more subframes of a frame.

公开(公告)号：US20220029773A1

公开(公告)日：2022-01-27

申请号：US17498703

申请日：2021-10-11

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Hao Xu ,  Peter Gaal

IPC: H04L5/14 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine a duplexing configuration (e.g., frequency division duplexing (FDD) or time division duplexing (TDD)) of a carrier based on one or more synchronization signals. The UE may then receive a master information block (MIB) on the carrier, and may interpret one or more fields of the MIB based on the duplexing configuration of the carrier. The configuration dependent fields may include a special subframe field, a system information location field, or both. In some cases, such as in a TDD configuration, the UE may postulate a special subframe configuration of the carrier in order to receive the MIB, and may update the postulated special subframe configuration after receiving the MIB.

公开(公告)号：US11212760B2

公开(公告)日：2021-12-28

申请号：US15249948

申请日：2016-08-29

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Alberto Rico Alvarino ,  Juan Montojo ,  Yongbin Wei ,  Jing Lei ,  Renqiu Wang ,  Seyed Ali Akbar Fakoorian ,  Peter Gaal ,  Wanshi Chen

IPC: H04W56/00 ,  H04L29/06 ,  H04W52/02 ,  H04L12/803 ,  H04W72/04 ,  H04L5/00 ,  H04L7/00 ,  H04H20/38 ,  H04W4/70

Abstract: Narrowband communications in a wireless communications system may include a common synchronization signal, such as a primary synchronization signal (PSS), secondary synchronization signal (SSS), or physical broadcast channel (PBCH). Content of the common synchronization signal may indicate a location of narrowband data transmissions in a narrowband region of a system bandwidth. The location of the narrowband region may be in-band within one or more wideband transmissions, within a guard-band bandwidth adjacent to the wideband transmissions bandwidth, or within a stand-alone bandwidth that is non-adjacent to the wideband transmissions. The common synchronization signal may be located within a predefined search frequency and may include an anchor synchronization channel present in certain resources of allocated narrowband communications resources. Narrowband data region resources may be distributed in other portions of the narrowband communications resources, and may be allocated to different users to provide transmit diversity.

公开(公告)号：US11212141B2

公开(公告)日：2021-12-28

申请号：US15376490

申请日：2016-12-12

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Hao Xu ,  Wanshi Chen ,  Xiaofeng Wang ,  Alberto Rico Alvarino

IPC: H04L25/02 ,  H04B7/06 ,  H04L5/00 ,  H04L1/06 ,  H04L25/03 ,  H04W84/04 ,  H04W4/70

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for implementing a data transmission scheme for Narrow-Band Internet of Things (NB-IoT). A User Equipment (UE) combines pairs of antenna ports to generate at least first and second combined antennas ports. The UE receives reference signals transmitted in a narrow band region of a larger system bandwidth, and for each combined port, adds the references signals received on resource elements (REs) of each of the combined pair of antenna ports. The UE determines channel estimates for each combined antenna port based on the added reference signals for the combined port.

公开(公告)号：US11212019B2

公开(公告)日：2021-12-28

申请号：US15714316

申请日：2017-09-25

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Alberto Rico Alvarino ,  Xiao feng Wang ,  Arvind Sridharan ,  Hao Xu

IPC: H04L12/00 ,  H04B17/309 ,  H04W4/70 ,  H04W52/32 ,  H04W48/12 ,  H04L27/26 ,  H04L29/08 ,  H04W88/02

Abstract: Techniques described herein permit a narrowband Internet of Things (NB-IoT) user equipment (UE) to combine narrowband reference signals (NRS) with other signals, which the NB-IoT UE already receives, to improve measurement accuracy. The UE may report whether the UE is capable of combining the NRS with another signal to determine a combined signal quality parameter, and may report the combined signal quality parameter to a base station.

公开(公告)号：US11171739B2

公开(公告)日：2021-11-09

申请号：US16763304

申请日：2018-10-26

Applicant: Qualcomm Incorporated ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Kai Chen ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

Inventor： Changlong Xu ,  Liangming Wu ,  Jian Li ,  Kai Chen ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

IPC: H04L1/00 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communications are described. An encoder of a wireless device may receive a transport block (TB) for transmission and segment the transport block into a set of multiple, smaller data segments that respectively In correspond to a plurality of code blocks of the TB. The encoder may generate a code block level (CB-level) error detection code (EDC) for a subset of the data segments. The encoder may generate a transport block-level (TB-level) EDC for the TB using the data segments. Each of the code blocks (CBs) may be of the same size and may include one of the data segments. A subset of the CBs may include a data segment from the subset of the data segments and one of the CB-level EDCs. The remaining CBs that are not part of the subset may include a remaining data segments and the TB-level EDC.

公开(公告)号：US11166192B2

公开(公告)日：2021-11-02

申请号：US16538672

申请日：2019-08-12

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Wanshi Chen ,  Hao Xu ,  Wei Zeng ,  Renqiu Wang ,  Peter Gaal ,  Tingfang Ji ,  John Edward Smee

IPC: H04W72/08 ,  H04W28/04 ,  H04B7/08 ,  H04J11/00 ,  H04L5/00 ,  H04L25/02 ,  H04L1/00 ,  H04B7/0452

Abstract: Signaling strategies for an advanced receiver with interference cancellation (IC) and suppression is discussed. Upon enablement of an advanced interference cancellation procedure according to the disclosure, transmitters within the enabled area transmit according to transmission restriction configurations that provide transmission limits based on either frequency, time, or scheduling. The restrictions on the transmitters reduces the complexity of processing by neighboring advanced receivers for cancellation of interference from the restricted transmitters. At the advanced receiver, transmission information, such as scheduling, reference signal (RS), resource block (RB) allocation, and the like, may either be determined through blind detection or received directly through signaling. The advanced receiver may use this transmission information associated with each interfering signal to detect, decode, and subtract the interfering signals from the received transmissions.

公开(公告)号：US11153870B2

公开(公告)日：2021-10-19

申请号：US16055860

申请日：2018-08-06

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Wanshi Chen ,  Xiaoxia Zhang ,  Neng Wang ,  Hao Xu ,  Peter Gaal

IPC: H04W52/14 ,  H04W72/04 ,  H04L1/18 ,  H04L1/00 ,  H04L5/00 ,  H04W52/04

Abstract: Aspects of the present disclosure relate to techniques that may help enable the determination of uplink resource allocation in systems that support dynamic uplink-downlink subframe configurations. An example method generally includes receiving signaling indicating a dynamic uplink-downlink (UL-DL) subframe configuration, determining hybrid automatic repeat request (HARQ) acknowledgment/negative acknowledgment (ACK/NACK) timing based on a reference UL-DL subframe configuration, and determining HARQ resource allocation based on the dynamic UL-DL subframe configuration.

公开(公告)号：US11122617B2

公开(公告)日：2021-09-14

申请号：US16510649

申请日：2019-07-12

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Wanshi Chen ,  Hao Xu ,  Hung Ly ,  Heechoon Lee

IPC: H04W74/00 ,  H04W74/08 ,  H04W84/04

Abstract: Wireless communication devices are adapted to facilitate a random access procedure. According to one example, scheduled entity can transmit a first transmission that is received by a scheduling entity. The first transmission may include a physical random access channel (PRACH) preamble sequence and a first message including information for determining a device-specific network identifier for the scheduled entity. The scheduling entity may transmit a second transmission that is received by the scheduled entity. The second transmission may include information on a physical downlink control channel (PDCCH) addressed to the device-specific network identifier for the scheduled entity, and a second message on a physical downlink shared channel (PDSCH). Other aspects, embodiments, and features are also included.