公开(公告)号：US10542530B2

公开(公告)日：2020-01-21

申请号：US15818475

申请日：2017-11-20

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：US20200021415A1

公开(公告)日：2020-01-16

申请号：US16582525

申请日：2019-09-25

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Wanshi Chen ,  Jelena Damnjanovic ,  Hao Xu ,  Madhavan Srinivasan Vajapeyam

IPC: H04L5/00 ,  H04W72/14 ,  H04W72/04

Abstract: Techniques are described for wireless communication. One method includes determining, based at least in part on a number of downlink component carriers (CCs) scheduled for a user equipment (UE) during a reporting interval, a number of bits to be included in a physical uplink control channel (PUCCH) acknowledgement/non-acknowledgement (ACK/NAK) payload for the reporting interval; and selecting, based at least in part on the determined number of bits, a format of the PUCCH ACK/NAK payload.

公开(公告)号：US10530625B2

公开(公告)日：2020-01-07

申请号：US15873668

申请日：2018-01-17

Applicant: QUALCOMM Incorporated

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

IPC: H04K1/10 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be configured with a transmission stream processor used to maintain a lower peak-to-average power ratio (PAPR) for uplink transmissions. In some cases, a UE may map modulated symbols of different signals (or waveforms) to interleaved subsets of frequency resources, and this form of frequency division multiplexing (FDM) may increase the PAPR of an uplink transmission. To reduce the PAPR of uplink transmissions, a transmission stream processor at the UE may support techniques for phase ramping modulated symbols in the time domain prior to mapping the symbols to the frequency resources. These techniques may help to ensure that the signals to be included in an uplink transmission are aligned in such a way that the PAPR of the uplink transmission is reduced.

公开(公告)号：US20190394755A1

公开(公告)日：2019-12-26

申请号：US16561543

申请日：2019-09-05

Applicant: QUALCOMM Incorporated

Inventor： Juan Montojo ,  Jelena M. Damnjanovic ,  Hao Xu ,  Wanshi Chen ,  Peter Gaal

IPC: H04W72/04 ,  H04L27/00 ,  H04W36/00 ,  H04W48/12 ,  H04W52/24 ,  H04W52/26 ,  H04W52/14 ,  H04L25/02

Abstract: A method of wireless communication provides narrow bandwidth operation within a wider LTE system bandwidth. Wideband information is transmitted to a first set of user equipments (UEs). Also, narrowband information is transmitted to a second set of UEs. The second set of UEs operate in a narrower bandwidth than the first set of UEs.

公开(公告)号：US20190379437A1

公开(公告)日：2019-12-12

申请号：US16476408

申请日：2018-02-05

Applicant: Se Yong PARK ,  Wei ZENG ,  Alexandros MANOLAKOS ,  Sony AKKARAKARAN ,  Yi HUANG ,  Renqiu WANG ,  Hao XU ,  Yu ZHANG ,  Joseph Binamira SORIAGA ,  Tingfang JI ,  Peter GAAL ,  Qualcomm Incorporated

Inventor： Se Yong Park ,  Wei Zeng ,  Alexandros Manolakos ,  Sony Akkarakaran ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Yu Zhang ,  Joseph Binamira Soriago ,  Tingfang Ji ,  Peter Gaal

IPC: H04B7/0456 ,  H04L27/26 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described that support a low peak-to-average power ratio (PAPR) precoded reference signal design for multiple-input, multiple-output (MIMO) transmissions. A user equipment (UE) may identify multiple sets of symbols associated with different reference signal waveforms, where each reference signal waveform may be associated with a low PAPR. In some cases, different single-carrier reference signal waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM) for a transmission on a single antenna. However, the addition of single-carrier waveforms through FDM for a transmission via an antenna may result in an uplink transmission having a high PAPR (e.g., as compared to single-carrier waveforms). The UE may reduce the PAPR of the uplink transmission by multiplexing the reference signal waveforms in the time domain (e.g., using time division multiplexing (TDM)).

公开(公告)号：US10485023B2

公开(公告)日：2019-11-19

申请号：US15707442

申请日：2017-09-18

Applicant: QUALCOMM Incorporated

Inventor： Kambiz Azarian Yazdi ,  Haitong Sun ,  Tingfang Ji ,  Wanshi Chen ,  Hao Xu ,  Heechoon Lee ,  Hung Ly

IPC: H04W74/00 ,  H04W72/12 ,  H04W74/08

Abstract: Certain aspects of the present disclosure provide techniques for payload-less physical uplink measurement indication channel (PUMICH) design for uplink based mobility. According to certain aspects, a method of wireless communication by a base station (BS) is provided. The method generally includes selecting a first set of random access procedure (RACH) sequences from a second set of RACH sequences, wherein the second set of RACH sequences comprises a pruned set of RACH sequences, and wherein at least some of the first set of RACH sequences selected for a first user equipment (UE) is also available for selection for a second UE, and transmitting the selected first set of RACH sequences to a UE in response to a request from the UE.

公开(公告)号：US10469229B2

公开(公告)日：2019-11-05

申请号：US16030453

申请日：2018-07-09

Applicant: QUALCOMM Incorporated

Inventor： Hung Ly ,  Tao Luo ,  Hao Xu

IPC: H04L5/00 ,  H04L5/14 ,  H04W72/04

Abstract: Techniques for signaling dynamic control region for PRACH transmission are described. In an aspect, the disclosure describes a method for receiving, at a user equipment (UE), an indication of a number of control symbols that the UE is to assume when transmitting physical random access channel (PRACH), and transmitting, by the UE, the PRACH over one or more slots based on the number of control symbols. In another aspect, the disclosure describes a method for generating, at a network device, an indication of a number of control symbols that a UE is to assume when transmitting PRACH, transmitting, by the network device, the indication to the UE. A UE and network device configuration as well as apparatuses and computer-readable medium related to these methods are also described.

公开(公告)号：US10462812B2

公开(公告)日：2019-10-29

申请号：US15955471

申请日：2018-04-17

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Tao Luo ,  Srinivas Yerramalli ,  Peter Gaal ,  Hao Xu ,  Wanshi Chen

IPC: H04W72/12 ,  H04W72/04 ,  H04W74/00 ,  H04W74/08

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. A base station transmits a provisional grant uplink assignment to a set of UEs. When a UE receives the provisional grant uplink assignment, the UE performs a clear channel assessment (CCA) operation on a secondary component carrier (SCC) based on the provisional grant UL assignment, the SCC being a contention-based carrier. Then, the UE transmits a schedule request (SR) on the SCC when the CCA operation succeeds. The base station transmits grant confirmation(s) on the SCC in response to the detected SR(s). Once the UE receives a grant confirmation on the SCC in response to the SR, the UE transmits data on the SCC.

公开(公告)号：US20190327051A1

公开(公告)日：2019-10-24

申请号：US16419268

申请日：2019-05-22

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind PATEL ,  Wanshi Chen ,  Juan Montojo ,  Peter Gaal ,  Seyedkianoush Hosseini ,  Aleksandar Damnjanovic ,  Hao Xu

IPC: H04L5/00 ,  H04B7/0413 ,  H04W72/04

Abstract: The present methods and apparatus enable transmission of an interlaced reference signal for two UEs using a comb structure. In some aspects, the present methods and apparatus may allocate resources and indicate whether a first UE and a second UE are to transmit DM-RS with a comb structure in a single slot based on the allocation. Further, in some aspects, the present methods and apparatus may allocate resources and transmit information indicating whether a first UE is to transmit DM-RS in a first slot or in both a first slot and a second slot within a subframe.

公开(公告)号：US10455517B2

公开(公告)日：2019-10-22

申请号：US15913513

申请日：2018-03-06

Applicant: QUALCOMM Incorporated

Inventor： Sony Akkarakaran ,  Tao Luo ,  Peter Gaal ,  Timo Ville Vintola ,  Hao Xu

IPC: H04B17/345 ,  H04W52/24 ,  H04W72/12 ,  H04W52/28 ,  H04W52/14 ,  H04L5/00 ,  H04B7/06 ,  H04B17/14 ,  H04B17/11 ,  H04L5/14

Abstract: Aspects of the present disclosure provide techniques for managing unwanted transmissions by a wireless communications device, such as spurious transient transmissions caused by changing a power level of a transmitter. An exemplary method includes determining, based on one or more parameters, an action to reduce an impact of a spurious transmission by the UE, wherein the spurious transmission relates to at least one of changing a transmit power level at the UE or switching one or more radio components at the UE, and taking the determined action to reduce the impact.