公开(公告)号：US10080244B2

公开(公告)日：2018-09-18

申请号：US15244385

申请日：2016-08-23

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Madhavan Srinivasan Vajapeyam ,  Wanshi Chen ,  Alberto Rico Alvarino ,  Renqiu Wang ,  Hao Xu ,  Seyed Ali Akbar Fakoorian ,  Shimman Arvind Patel ,  Peter Gaal

IPC: H04W74/08 ,  H04W72/04 ,  H04L5/00 ,  H04W16/30 ,  H04W72/02 ,  H04W74/00

CPC classification number: H04W74/0833 ,  H04L5/0048 ,  H04W16/30 ,  H04W72/02 ,  H04W72/0453 ,  H04W74/002

Abstract: Random access techniques may use subcarriers allocated for random access requests in narrowband communication. Physical resources may be selected for transmission of a random access request based on a “coverage class” of a user equipment (UE). In some examples, a set of coverage classes may be identified based on one or more UE channel conditions, such as pathloss. Each coverage class may have one or more associated subcarriers of a set of subcarriers in a narrowband bandwidth, and random access messages may be transmitted using the associated subcarrier(s) for the coverage class of a UE. In some examples, different coverage classes may have different numbers of redundant transmissions of a random access message, which may be based on channel conditions associated with a particular coverage class. A UE, based on a measured channel condition, may determine a coverage class and select a subcarrier based on the determined coverage class.

公开(公告)号：US20180213510A1

公开(公告)日：2018-07-26

申请号：US15693197

申请日：2017-08-31

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L5/00

Abstract: Some techniques and apparatuses described herein may assign resource elements of a particular resource block for transmission by two or more different antennas in a fashion such that the symbols are interleaved in frequency and/or in time, which improves frequency diversity of the two or more different antennas, thereby improving uplink performance of the UE. In some aspects, when the two or more resource blocks are contiguous, then each antenna may produce an interleaved frequency division multiple access (IFDMA) waveform, which may maintain peak to average power ratio (PAPR) properties of a single channel FDMA transmission. Thus, some techniques and apparatuses described herein may achieve transmit diversity and/or frequency diversity of a stream of symbols on two or more antennas without significantly increasing the PAPR of the stream of symbols.

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：US20180212728A1

公开(公告)日：2018-07-26

申请号：US15874712

申请日：2018-01-18

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Yi Huang ,  Hao Xu ,  Wei Zeng ,  Peter Gaal

IPC: H04L5/00 ,  H04W72/14 ,  H04B7/0413

Abstract: Multiple-input, multiple-output (MIMO) devices and non-MIMO devices may implement a flexible comb-based design for transmission of reference signals, such as demodulation reference signals (DMRSs). User equipment (UEs) of different ranks may use the flexible comb-based design to transmit the reference signals in a common comb pattern within an allocated bandwidth. UEs using as many antenna ports as combs in the common comb pattern may transmit a different reference signal using a different antenna port over each comb, while UEs using fewer antenna ports than combs may concatenate combs, so that the UEs may transmit a reference signal using a single antenna port over multiple combs. Using the flexible comb-based design, a base station may be capable of better manage inter-cell interference and multiplexing of different rank UEs in shared resource blocks (RBs) may be supported.

公开(公告)号：US20180098341A1

公开(公告)日：2018-04-05

申请号：US15705175

申请日：2017-09-14

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Hao Xu ,  Wanshi Chen ,  Yi Huang ,  Peter Gaal ,  Tingfang Ji

IPC: H04W72/12 ,  H04L5/00 ,  H04W72/04

Abstract: Wireless communication devices, such as a scheduled entity, are adapted to facilitate uplink transmissions on multiple physical uplink control channels (PUCCHs) of a regular burst period. According to one example, a scheduled entity may obtain a payload for an uplink transmission on a PUCCH. The scheduled entity may subsequently send the uplink transmission utilizing two or more physical uplink control channels (PUCCH) of a regular burst period, where each PUCCH is associated with a different frequency band of the regular burst period. According to one example, a scheduling entity may receive an uplink transmission, where the uplink transmission utilizes a first PUCCH of a regular burst period, and at least a second PUCCH of the regular burst period, each of the first and second PUCCHs being associated with respectively different frequency bands of the regular burst period. Other aspects, embodiments, and features are also included.

公开(公告)号：US09930700B2

公开(公告)日：2018-03-27

申请号：US15132988

申请日：2016-04-19

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Hao Xu ,  Wanshi Chen ,  Peter Gaal

IPC: H04B7/00 ,  H04W74/08 ,  H04B17/318 ,  H04W76/02 ,  H04W52/02 ,  H04W4/00 ,  H04W52/14 ,  H04W52/50 ,  H04W52/36

CPC classification number: H04W74/0833 ,  H04B17/318 ,  H04W4/70 ,  H04W52/0245 ,  H04W52/146 ,  H04W52/367 ,  H04W52/50 ,  H04W76/10 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21

Abstract: Methods, systems, and devices are described for initial power level selection on a physical random access channel in a wireless communications network. Initial power level selection may account for, or be based on, one or more channel conditions associated with the physical random access channel. Initial power level selection may be based on signaling of available initial power transmission levels and a reference signal received power measurement. The described features may be implemented as coverage enhancement techniques, for example, for machine-type communication (MTC).

公开(公告)号：US20180049173A1

公开(公告)日：2018-02-15

申请号：US15465498

申请日：2017-03-21

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Renqiu Wang ,  Tingfang Ji ,  Wei Zeng ,  Yi Huang

IPC: H04W72/04 ,  H04W76/04 ,  H04L5/00

CPC classification number: H04W72/044 ,  H04L5/0048 ,  H04W72/0413 ,  H04W72/0446 ,  H04W76/28 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communication are described for a data channel-referenced resource allocation for a control channel. In an implementation, a user equipment (UE) may identify, for a transmission time interval (TTI), a first uplink resource allocation to the UE of a first channel. The UE may determine, based at least in part on the first uplink resource allocation of the first channel, a second uplink resource allocation of a second channel to the UE. The UE may transmit, during the TTI, the first channel and the second channel.

公开(公告)号：US20180035423A1

公开(公告)日：2018-02-01

申请号：US15458017

申请日：2017-03-13

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Hao Xu ,  Wei Zeng ,  Jing Jiang ,  Tingfang Ji

IPC: H04W72/04 ,  H04L1/00 ,  H04B17/336 ,  H04B7/0413 ,  H04L5/00

CPC classification number: H04W72/0413 ,  H04B7/0413 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0007 ,  H04L5/0021 ,  H04L5/0028 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0092 ,  H04L27/0008

Abstract: Methods, systems, and devices for wireless communication are described A user equipment (UE) and a base station may support switching from one waveform to another on uplink channels. For example, a UE and a base station may utilize both frequency division multiplexing (SC-FDM) waveform and an orthogonal frequency division multiplexing (OFDM) waveforms based on channel conditions and other factors. In some examples, a UE may switch for some uplink channels, and use a single waveform for other channels. For example, switching waveforms for channels that utilize frequency domain code division multiplexing (CDM) channel may interrupt the orthogonality of multiplexed transmissions. A UE may transition from one waveform to another either autonomously or based on an explicit indication from a base station. If a UE switches autonomously, it may send an indication of the transition to the serving base station.

公开(公告)号：US09813497B2

公开(公告)日：2017-11-07

申请号：US14336533

申请日：2014-07-21

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Renqiu Wang ,  Ravi Palanki ,  Naga Bhushan

IPC: H04L29/08 ,  H04W8/00 ,  H04W76/02 ,  H04W84/18

CPC classification number: H04L67/1063 ,  G06F17/3005 ,  H04L67/1061 ,  H04L67/1068 ,  H04W8/005 ,  H04W76/14 ,  H04W84/18

Abstract: Techniques for performing network-assisted peer discovery to enable peer-to-peer (P2P) communication are described. In one design, a device registers with a network entity (e.g., a directory agent) so that the presence of the device and possibly other information about the device can be made known to the network entity. The network entity collects similar information from other devices. The device sends a request to the network entity, e.g., during or after registration. The request includes information used to match the device with other devices, e.g., information about service(s) provided by the device and/or service(s) requested by the device. The directory agent matches requests received from all devices, determines a match between the device and at least one other device, and sends a notification to perform peer discovery. The device performs peer discovery in response to receiving the notification from the network entity.

公开(公告)号：US20170264406A1

公开(公告)日：2017-09-14

申请号：US15376025

申请日：2016-12-12

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W72/04 ,  H04W48/16 ,  H04W4/00

CPC classification number: H04L5/0048 ,  H04J11/0069 ,  H04L5/001 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675 ,  H04L2027/0026 ,  H04W4/70 ,  H04W48/16 ,  H04W56/0015 ,  H04W72/0406 ,  H04W88/02 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21

Abstract: Methods, systems, and devices for wireless communication are described. A base station may broadcast a synchronization signal using a narrowband portion of a bandwidth of a cell. The synchronization signal may include a sequence repeated over several symbol periods using a cover code to support power-efficient cell acquisition. A user equipment (UE) receiving the synchronization signal may determine frequency and timing information for a cell by performing a weighted combination and accumulation of low complexity autocorrelation and cross-correlation procedures on the synchronization signal. The reduced complexity correlation procedures may be enabled based on the use of the cover code and a base sequence. In some cases, the cross-correlation may be performed at multiple sampling rates. The use of the cover code within the synchronization signal may also support correlation procedures that use recursive or repeated updates, which may allow for further reduced computational complexity relative to other cell search procedures.