公开(公告)号：US20190394750A1

公开(公告)日：2019-12-26

申请号：US16559685

申请日：2019-09-04

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan VAJAPEYAM ,  Hao XU ,  Wanshi CHEN ,  Peter GAAL ,  Masato KITAZOE ,  Miguel GRIOT

IPC: H04W68/02 ,  H04W68/00 ,  H04W72/04 ,  H04W74/08

Abstract: Certain aspects of the present disclosure generally relate to wireless communications, and more specifically to enhanced paging procedures for devices with limited communications resources, such as machine type communication (MTC) devices and enhanced or evolved MTC (eMTC) devices. An example method generally includes determining a set of subframes corresponding to a paging occasion for the UE to receive a paging message from a base station (BS), determining, within the set of subframes, at least one narrowband region for receiving the paging message, and monitoring for the paging message in the at least one narrowband region within the set of subframes.

公开(公告)号：US20190386861A1

公开(公告)日：2019-12-19

申请号：US16552943

申请日：2019-08-27

Applicant: QUALCOMM Incorporated

Inventor： Seyong PARK ,  Peter GAAL ,  Yi HUANG ,  Renqiu WANG ,  Hao XU ,  Tao LUO

IPC: H04L27/26 ,  H04B7/06

Abstract: Adjacent channel leakage-power ratio (ACLR) can be reduced at a transmitter of a device. A modulated signal can be mapped into a plurality of tone sets in a frequency domain, wherein the plurality of tone sets include a first, a second, and a third set of tones. The first and the third set of tones can be converted in the frequency domain to a fourth and a fifth set of tones, respectively, in a time domain. A zero padding of one or more symbols associated with the fourth and the fifth set of tones can be performed to output a sixth and a seventh set of tones, respectively. The sixth and the seventh set of tones can be converted to an eighth and a ninth set of tones, respectively, in the frequency domain. The eighth and the ninth set of tones can be processed for transmitting to another wireless device.

公开(公告)号：US20190342054A1

公开(公告)日：2019-11-07

申请号：US16517305

申请日：2019-07-19

Applicant: QUALCOMM Incorporated

Inventor： Seyong PARK ,  Jing SUN ,  Xiao Feng WANG ,  Hao XU ,  Tao LUO ,  Yi HUANG ,  Renqiu WANG

IPC: H04L5/00 ,  H04J3/00 ,  H04L27/26

Abstract: Aspects of the disclosure relate to methods and apparatus of time-domain multiplexing (TDM) for reference signals (RS) and data using a modified cyclic prefix. A reference signal (RS) and data are multiplexed either in a single symbol or in two time consecutive symbols that respectively including the RS and data. The cyclic prefix (CP) is added to the single symbol using a portion of the RS or to a first symbol of the two time consecutive symbols using a portion of the RS. The CP may be copied from the RS or the end of the symbol, but not the data, in a manner that affords a virtual Time Division Multiplexing (TDM) of the RS and data before discrete Fourier transform (DFT) spreading is performed in a transceiver to provide lower peak to average power ratios and no Inter-symbol interference.

公开(公告)号：US20190296953A1

公开(公告)日：2019-09-26

申请号：US16442017

申请日：2019-06-14

Applicant: QUALCOMM Incorporated

Inventor： Yi HUANG ,  Wanshi CHEN ,  Hao XU ,  Wei ZENG

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04

Abstract: A method and apparatus for demodulation reference signal (DMRS) communication are described. The method and apparatus include determining a DMRS pattern for at least two multiplexing schemes. In some aspects, the at least two multiplexing schemes may include orthogonal frequency-division multiplexing (OFDM) and single carrier frequency-division multiplexing (SC-FDM). Further, in some aspects, the DMRS pattern may correspond to a continuous tone pattern in each subframe transmitted in accordance with both SC-FDM and OFDM. Additionally, in some aspects, the DMRS pattern may correspond to a comb tone pattern in each subframe transmitted in accordance with both SC-FDM and OFDM. The method and apparatus further include transmitting a DMRS in accordance with at least one of the two multiplexing schemes and based on the DMRS pattern.

公开(公告)号：US20190289559A1

公开(公告)日：2019-09-19

申请号：US16430016

申请日：2019-06-03

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Wanshi CHEN ,  Hao XU ,  Seyed Ali Akbar FAKOORIAN

IPC: H04W52/38 ,  H04B17/318 ,  H04W48/12 ,  H04W52/02 ,  H04W52/14 ,  H04W52/18 ,  H04W52/44 ,  H04B17/23

Abstract: Aspects of the present disclosure provide techniques that may be used by a BS and/or UE to reduce the time associated with performing cell acquisition. An exemplary method, performed by a BS, generally includes determining opportunities for assisting cell acquisition by one or more UEs, and boosting transmission power for one or more signals used for cell acquisition during the determined opportunities. Another exemplary method, performed by a UE, generally includes exiting a first low power state in order to perform cell acquisition based on one or more signals transmitted by a base station, and taking one or more actions to reduce acquisition time when performing the cell acquisition.

公开(公告)号：US20190239195A1

公开(公告)日：2019-08-01

申请号：US16378239

申请日：2019-04-08

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W52/02 ,  H04W76/28 ,  H04W4/70

CPC classification number: H04W72/042 ,  H04L1/1822 ,  H04L1/189 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0057 ,  H04W4/70 ,  H04W52/0225 ,  H04W76/28 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/21 ,  Y02D70/24 ,  Y02D70/26

Abstract: In eMTC, channels may be bundled, using repetitions in multiple subframes. SPS and DRX for eMTC may not accommodate such repetitions, because repetitions for a bundled channel may fall only partially within a DRX ON duration. An apparatus addresses this problem by determining a DRX ON duration, determining a set of subframes carrying a bundled M-PDCCH candidate and determining that the DRX ON duration at least partially overlaps with the set of subframes of the bundled M-PDCCH. The apparatus then refrains from decoding the first bundled M-PDCCH candidate, decodes the first bundled M-PDCCH candidate, or extends the DRX ON duration to include the set of subframes entirely and decoding the first bundled M-PDCCH candidate carried in the set of subframes in the extended DRX ON duration. The apparatus may also determine DRX configuration parameters based on parameters of bundled channels, and handle invalid subframes for an SPS grant.

公开(公告)号：US20190239176A1

公开(公告)日：2019-08-01

申请号：US16359848

申请日：2019-03-20

Applicant: QUALCOMM Incorporated

Inventor： Jing LEI ,  Hao XU ,  Peter GAAL ,  Xiaofeng WANG ,  Wanshi CHEN ,  Yongbin WEI ,  Juan MONTOJO ,  Alberto RICO ALVARINO

IPC: H04W56/00 ,  H04W16/32 ,  H04J13/00 ,  H04L5/00

CPC classification number: H04W56/001 ,  H04J13/0062 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2659 ,  H04L27/266 ,  H04W16/32 ,  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：US20190215835A1

公开(公告)日：2019-07-11

申请号：US16356813

申请日：2019-03-18

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Peter GAAL ,  Xiao Feng WANG ,  Wanshi CHEN ,  Seyed Ali Akbar FAKOORIAN ,  Hao XU ,  Renqiu WANG ,  Jing LEI

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

CPC classification number: H04W72/0453 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0092 ,  H04W4/70 ,  H04W72/087 ,  H04W88/02 ,  H04W88/08

Abstract: Aspects of the present disclosure provide techniques for design of channel raster for narrowband operation. One example method, performed by a base station, generally includes determining, based on one or more conditions, an exact frequency location of one channel of one or more channels to perform narrowband communications with a user equipment. The method also includes transmitting an indication of the one or more conditions to the user equipment. The method further includes communicating with the UE, based at least in part on the exact frequency location of the one channel.

公开(公告)号：US20190182676A1

公开(公告)日：2019-06-13

申请号：US16276444

申请日：2019-02-14

Applicant: QUALCOMM Incorporated

Inventor： Hao XU ,  Wanshi CHEN

IPC: H04W16/14 ,  H04W4/70 ,  H04W74/08

Abstract: Aspects of the present disclosure provide techniques utilizing shared radio frequency spectrum (SRFS) for certain devices, such as machine type communication(s) (MTC) user equipments (UEs) and evolved or enhanced MTC (eMTC) UEs. An exemplary method, performed, for example, by a base station (BS), includes performing a channel clear assessment (CCA) for at least a portion of the SRFS including one or more narrowband regions, and communicating with at least one MTC UE, after performing the CCA, on at least one of the narrowband regions. A second exemplary method, performed, for example, by a MTC UE, generally includes receiving, from a BS, an assignment of resources in a narrowband region of the SRFS band for the MTC UE to use for communicating with the BS, and communicating with the BS on the narrowband region without performing a CCA for the narrowband region. A third exemplary method, performed, for example, by a MTC UE, generally includes performing a CCA for a narrowband region of the SRFS band and communicating with a BS on the narrowband region.

公开(公告)号：US20190149284A1

公开(公告)日：2019-05-16

申请号：US16246139

申请日：2019-01-11

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Kirankumar Bhoja ANCHAN ,  Shashidhar VUMMINTALA ,  Srinivasan BALASUBRAMANIAN ,  Hao XU ,  Parvathanathan SUBRAHMANYA ,  Seyed Ali Akbar FAKOORIAN ,  Peter GAAL ,  Gowrisankar SOMICHETTY

IPC: H04L5/00 ,  H04W72/14 ,  H04L29/06 ,  H04W72/12

Abstract: Aspects of the present disclosure relate to methods and apparatus for optimizing real time services (e.g., such as a voice over Long Term Evolution (LTE) (VoLTE)) for devices with limited communications resources, such as machine type communication (MTC) devices and enhanced MTC (eMTC) devices. In one aspect, a UE determines a first configuration of subframes within at least one radio frame available for the UE and other UEs to use for bundled communications with a BS. The UE receives an indication of one or more subframes within the at least one radio frame that are unavailable for bundled uplink transmissions, and determines a second configuration of subframes to use for bundled communications based on the indication. The UE overrides the first configuration of subframes with the second configuration of subframes, and communicates with the BS using the second configuration of subframes. Numerous other aspects are provided.