公开(公告)号：US20200374034A1

公开(公告)日：2020-11-26

申请号：US16759255

申请日：2018-11-20

Applicant: Changlong XU ,  Kai CHEN ,  Jing JIANG ,  Gabi SARKIS ,  Hao XU ,  QUALCOMM Incorporated

Inventor： Changlong XU ,  Kai CHEN ,  Jing JIANG ,  Gabi SARKIS ,  Hao XU

IPC: H04L1/00 ,  H04L1/08 ,  H04L1/18

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for rate-matching a stream of bits encoded using polar codes. An exemplary method generally includes determining a target coding rate, RT, for transmitting a group of K information bits, based on a first coding rate, R1, corresponding to a first target block error rate (BLER) for a first transmission of a first redundancy version (RV) of the packet and a second coding rate, R2, corresponding to a second target BLER for a last transmission of a last RV of the packet; determining a circular buffer size, N, of a circular buffer for use in transmitting the first RV and the last RV of the packet; generating encoded information bits from the K information bits using a polar code having a mother code size of N; writing the encoded information bits to the circular buffer; determining a maximum number of retransmissions, based on a latency requirement for the packet; generating different RVs from the encoded information bits in the circular buffer, each RV based on a corresponding target BLER; and transmitting the first RV via a wireless medium.

公开(公告)号：US20200322936A1

公开(公告)日：2020-10-08

申请号：US16909817

申请日：2020-06-23

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Wanshi CHEN ,  Tingfang JI ,  Tao LUO ,  Heechoon LEE ,  Hao XU ,  Peter GAAL

IPC: H04W72/04 ,  H04L5/00

Abstract: The present disclosure describes various aspects of the implementation and design of Physical Downlink Control Channel (PDCCH) in 5G new radio (NR) applications. Aspects include methods, apparatuses, and computer-readable medium for one or more of multiple PDCCH search spaces, control resource block (CRB), irregular multiple slots or mini-slots grants, or fast control channel signaling for grant-free uplink (UL). For example, different scheduling entities can each have one or two search spaces defined (e.g., common and/or user equipment (UE)-centric search spaces). Also, CRBs can be used as units for PDCCH transmission instead of resource element groups/control channel elements (REGs/CCEs). In addition, irregularities in time domain, frequency domain, or both can be introduced in the granting of resource blocks (RBs) over multiple slots or mini-slots. Moreover, signaling can be used to indicate to a UE configured for grant-free UL the portion of the pool of resources available for grant-free UL.

公开(公告)号：US20200295895A1

公开(公告)日：2020-09-17

申请号：US16650056

申请日：2018-09-28

Applicant: QUALCOMM Incorporated

Inventor： Liangming WU ,  Yu ZHANG ,  Chenxi HAO ,  Chao WEI ,  Wanshi CHEN ,  Hao XU

IPC: H04L5/00 ,  H04W72/04

Abstract: Certain aspects of the present disclosure relate to methods and apparatus relating to rate matching for new radio (NR) physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH). In certain aspects, a method includes receiving a rate matching resource (RMR) configuration from a serving cell. The method also includes identifying one or more first resource elements (REs) to be rate matched around at least in part based on a transmission numerology associated with the RMR configuration, wherein the one or more first REs are used for reference signal (RS) transmission in the serving cell or a neighboring cell. The method further includes mapping a physical downlink shared channel (PDSCH) to one or more second REs not including the first REs.

公开(公告)号：US20200275380A1

公开(公告)日：2020-08-27

申请号：US16870581

申请日：2020-05-08

Applicant: QUALCOMM Incorporated

Inventor： Hao XU ,  Peter GAAL ,  Wanshi CHEN ,  Stefan GEIRHOFER ,  Madhavan Srinivasan VAJAPEYAM

IPC: H04W52/14 ,  H04W52/24 ,  H04L5/00 ,  H04W52/28 ,  H04W52/54 ,  H04W52/08 ,  H04W52/10 ,  H04W52/36 ,  H04W52/50 ,  H04W52/32 ,  H04W52/46 ,  H04B7/024

Abstract: Techniques for performing path loss (PL) compensation in coordinated multipoint (CoMP) systems are provided. A method for wireless communications by a user equipment (UE) is provided. The method generally includes selecting, from a plurality of transmission points involved in uplink (UL) coordinated multipoint (CoMP) operations with the UE, a transmission point to associate with for path loss (PL) compensation, and adjusting power of one or more transmissions based on path loss measured based on the selected transmission point

公开(公告)号：US20200259505A1

公开(公告)日：2020-08-13

申请号：US16636499

申请日：2017-08-12

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Liangming WU ,  Hao XU

IPC: H03M13/15

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for rate-matching a stream of bits encoded using polar codes. An exemplary method generally includes encoding K information bits using a polar code with a mother code length, N, to generate a stream of encoded bits storing a portion of the encoded bits in a circular buffer of size N reordering P blocks of the circular buffer according to row weights of a Hadamard matrix J interlacing the encoded bits of the blocks having a same row weight selecting, based on the row weights, a subset of the encoded bits in the blocks to modify modifying the selected subset of the encoded bits and transmitting the encoded bits in the P blocks, subsequent to modifying the selected subset of the encoded bits, via transmission resources.

公开(公告)号：US20200252972A1

公开(公告)日：2020-08-06

申请号：US16652140

申请日：2018-09-25

Applicant: Qualcomm Incorporated

Inventor： Alberto Rico Alvarino ,  Wanshi CHEN ,  Xiao Feng WANG ,  Le LIU ,  Umesh PHUYAL ,  Peng CHENG ,  Chao WEI ,  Hao XU

IPC: H04W74/08 ,  H04L27/26

Abstract: Methods, systems, and devices for increasing physical random access channel (PRACH) capacity using orthogonal cover codes (OCCs) in wireless communications systems are described. A base station may transmit a PRACH configuration that indicates PRACH resources for system access, for example, in a system information block (SIB). A user equipment (UE) may receive the PRACH configuration, and may identify PRACH resources that support OCCs for system access. For example, PRACH configurations with small time domain spacing between PRACH resources may support OCCs. The UE may determine whether to transmit random access (RACH) preamble messages using OCCs in the PRACH resources, and may transmit a RACH preamble message to the base station based on the determination. In some cases, the base station may additionally indicate PRACH resources not configured for OCCs, and the UE may determine which set of resources to transmit in based on one or more parameters.

公开(公告)号：US20200187198A1

公开(公告)日：2020-06-11

申请号：US16788790

申请日：2020-02-12

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Wanshi CHEN ,  Hao XU ,  Madhavan Srinivasan VAJAPEYAM ,  Peter GAAL

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W4/70 ,  H04L1/08

Abstract: Aspects of the present disclosure provide hybrid automatic repeat request (HARQ) techniques for enhanced machine type communication (eMTC). In one aspect, a method is provided which may be performed by a wireless device such as a user equipment (UE) for determining a HARQ ID. The method generally includes determining a HARQ ID based, at least in part, on a coverage enhancement (CE) level, and performing a HARQ process timeline based, at least in part, on the determined HARQ ID. Another method is provided for determining a subframe to transmit feedback. The method generally includes determining at least one subframe to transmit a physical uplink control channel (PUCCH) to acknowledge one or more downlink transmissions based, at least in part, on availability of uplink subframes following one or more downlink subframes carrying the downlink transmissions to be acknowledged and transmitting the PUCCH in the determined at least one subframe.

公开(公告)号：US20200100229A1

公开(公告)日：2020-03-26

申请号：US16697524

申请日：2019-11-27

Applicant: QUALCOMM Incorporated

Inventor： Wanshi CHEN ,  Hao XU ,  Juan MONTOJO ,  Peter GAAL

IPC: H04W72/04 ,  H04L5/00

Abstract: Certain aspects of the present disclosure relate to techniques for reducing the decoding complexity for low cost devices (e.g., low cost UEs). One technique may include simplifying the PDCCH format. This may include generating a compact DCI format for transmitting DCI to a low cost device. The compact DCI format may correspond to at least one standard DCI format used by a regular UE and may comprise a reduced number of bits when compared to the standard DCI format. Another technique may include reducing the number of blind decodes. This technique may include selecting a set of resources for transmitting DCI from a limited set of decoding candidates, such that a receiving low cost device need only perform blind decodes for the limited set of decoding candidates.

公开(公告)号：US20200084832A1

公开(公告)日：2020-03-12

申请号：US16683879

申请日：2019-11-14

Applicant: QUALCOMM Incorporated

Inventor： Hao XU ,  Srinivas YERRAMALLI ,  Juan MONTOJO ,  Yongbin WEI ,  Peter GAAL ,  Wanshi CHEN ,  Alberto RICO ALVARINO

IPC: H04W84/18 ,  H04W4/70 ,  H04L29/08 ,  H04W16/16 ,  H04W28/02 ,  H04W84/10 ,  H04W92/18 ,  H04B1/713 ,  H04L1/00

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for wireless communication, and more particularly, to design principles for extending Internet of Things (IoT) (e.g., narrowband IoT (NB-IoT), machine type communication(s) (MTC), etc.) into an unlicensed radio frequency (RF) band spectrum. In certain aspects, the method generally includes determining an interlace structure of tones, within an unlicensed radio frequency (RF) spectrum, available to a wireless node for communication, and communicating based on the interlace structure. In some aspects, the communicating involves hopping between tones within the interlace structure during different communication intervals.

公开(公告)号：US20200008191A1

公开(公告)日：2020-01-02

申请号：US16566835

申请日：2019-09-10

Applicant: QUALCOMM Incorporated

Inventor： Renqiu WANG ,  Wanshi CHEN ,  Peter GAAL ,  Wei ZENG ,  Hao XU ,  Yi HUANG

IPC: H04W72/04 ,  H04L5/00

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided that may be configured to receive a downlink control message, to determine a beta offset value for transmitting UCI based at least in part on the downlink control message, and to transmit the UCI on an uplink shared channel interleaved with data based on the determined beta offset value. The apparatus may identify the beta offset from a set of values based on the downlink control message. An apparatus may identify resources allocated for PUSCH and may map UCI to the identified resources for PUSCH in a frequency interleaved manner over a bandwidth of the identified resources. The apparatus may map data to the identified resources in a time-first or frequency-first manner, and may transmit a signal comprising UCI and data on the identified resources of the PUSCH in accordance with the mapping.