公开(公告)号：US11233614B2

公开(公告)日：2022-01-25

申请号：US16385929

申请日：2019-04-16

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L5/00 ,  H04W56/00

Abstract: A method and a system for narrowband wireless communication is disclosed. The base station constructs a DRS comprising a first set of contiguous NPSS subframes followed by a second set of contiguous repeating NSSS subframes. The DRS may further comprise a third set of NSSS subframes followed by a fourth set of NPSS subframes. The base station may apply a cover code to symbols of the NPSS subframes. The base station transmits the NPSS/NSSS subframes as part of a DRS subframe on an anchor channel.

公开(公告)号：US20220015100A1

公开(公告)日：2022-01-13

申请号：US17357342

申请日：2021-06-24

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Vasanthan Raghavan ,  Arumugam Chendamarai Kannan ,  Vinay Chande ,  Junyi Li ,  Giovanni Chisci ,  Xiaoxia Zhang ,  Tao Luo ,  Jing Sun ,  Sungwoo Park

IPC: H04W72/04 ,  H04L5/00 ,  H04B7/08 ,  H04L27/26 ,  H04W56/00

Abstract: Methods, systems, and devices for wireless communications are described. To support a reliable array response for wideband communications, a base station may configure a set of transmission instances for a set of signals distributed across a wideband carrier bandwidth. At least one transmission instance of the set of transmission instances may be configured in each sub-band of the carrier bandwidth. The base station may transmit the set of signals in the configured transmission instances to a user equipment (UE). The UE may receive the set of signals distributed across the carrier bandwidth and may measure, for the signals, a set of signal measurements corresponding to the set of sub-bands. Based on the signal measurements, the UE may determine a set of communication beams for the set of sub-bands. Using one or more of the determined communication beams, the UE may communicate with the base station in the carrier bandwidth.

公开(公告)号：US11191103B2

公开(公告)日：2021-11-30

申请号：US16674763

申请日：2019-11-05

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Ozcan Ozturk

IPC: H04W74/00 ,  H04W16/14 ,  H04W74/08 ,  H04W72/12

Abstract: Uplink signaling in unlicensed or shared spectrum may be subject to listen before talk procedures resulting in failed signaling transmissions. A user equipment (UE) may perform uplink signaling using a configuration based on whether a base station has entered a channel occupancy time (COT) shared with the UE. A UE may determine that the UE has an uplink transmission for a base station. A UE may determine whether the base station has entered a channel occupancy time that is shared with the UE. A UE may determine configured random access or scheduling request transmission resources based on the channel occupancy time, wherein a density of transmission opportunities is greater outside of the shared channel occupancy time than within the shared channel occupancy time. A UE may transmit a random access message or the scheduling request on selected configured resources.

公开(公告)号：US11184872B2

公开(公告)日：2021-11-23

申请号：US16836543

申请日：2020-03-31

Applicant: QUALCOMM Incorporated

Inventor： Rajat Prakash ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Seyed Ali Akbar Fakoorian ,  Vinay Joseph

IPC: H04W56/00

Abstract: A wireless communication system is provided allowing a base station to indicate RTT compensation for UEs to adjust their local time clocks to correct propagation delay timing errors and synchronize with the global clock of a base station. A base station sends a downlink transmission including timing information to a UE and receives an uplink transmission from the UE after the downlink transmission. The base station determines a RTT compensation associated with the timing information based on a RTT between the downlink transmission and the uplink transmission. The base station then transmits the RTT compensation to the UE. UEs are thus allowed to synchronize at a high precision with the time clock of the base station. UEs may be configured with different resolutions or granularities in timing correction so that certain UEs can achieve high precision timing correction while other UEs can adjust their time clocks with less precision.

公开(公告)号：US11159289B2

公开(公告)日：2021-10-26

申请号：US16449249

申请日：2019-06-21

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Wanshi Chen ,  Peter Gaal ,  Jing Sun ,  Hao Xu ,  Srinivas Yerramalli

IPC: H04L5/00 ,  H04L5/14 ,  H04W72/04 ,  H04W56/00

Abstract: An apparatus may use inactive uplink portions of a downlink CC to transmit SRS to an eNB. At times there may be a collision between the SRS transmission and uplink transmissions or downlink transmissions on another CC. The apparatus receives a carrier aggregation configuration for a first downlink CC and a second CC, determines to transmit an uplink transmission on the second CC or to receive a downlink transmission on the second CC, determines that the SRS would at least partially collide with the uplink transmission or the downlink transmission, and determines to adjust at least one of the uplink transmission, the SRS transmission, or reception of the downlink transmission based on the determination of the collision and an interruption time to transmit the SRS in the uplink portion of the first CC.

公开(公告)号：US20210329584A1

公开(公告)日：2021-10-21

申请号：US17221619

申请日：2021-04-02

Applicant: QUALCOMM Incorporated

Inventor： Rajat Prakash ,  Lorenzo Ferrari ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Alexandros Manolakos ,  Sven Fischer ,  Stephen William Edge

IPC: H04W64/00 ,  H04L5/00 ,  H04W4/02 ,  H04W24/10 ,  H04B17/27 ,  H04W72/12

Abstract: A wireless network including user equipment (UE) and base stations is configured to perform position determination with low latency and high availability within the Time-Sensitive Networking (TSN) framework. For example, the UE may be integrated as a sensor in a motion control system or similar applications. The UE and base stations are synchronized with the TSN clock, and are configured to perform positioning measurements at a specific time point within the TSN framework. The time point, for example, may be a global sampling point, at which all sensor nodes in the TSN framework perform position measurements. A location server may be provided with the positioning measurements or a position estimate from the UE and provide the position estimate to an external client, such as a motion controller in a motion control system.

公开(公告)号：US11140720B2

公开(公告)日：2021-10-05

申请号：US16661609

申请日：2019-10-23

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Jing Sun ,  Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Ozcan Ozturk

IPC: H04W72/00 ,  H04W74/08 ,  H04W74/00 ,  H04W56/00 ,  H04W76/11 ,  H04L1/18 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. The method includes identifying that the user equipment (UE) is to use a two-step random access channel (RACH) procedure that includes a first message (e.g., uplink request message) and a second message (e.g., downlink response). The methods include sending, as a first message of the two-step RACH procedure, the uplink request message to a base station, receiving, from the base station, a physical downlink control channel comprising an indication of resources of a broadcast or multicast physical downlink shared channel on which the downlink response is to be received, and receiving the downlink response from the base station on the broadcast or multicast physical downlink shared channel. The physical downlink shared channel may be configured to provide downlink responses for one or multiple UEs.

公开(公告)号：US11128426B2

公开(公告)日：2021-09-21

申请号：US16839640

申请日：2020-04-03

Applicant: QUALCOMM Incorporated

Inventor： Sungwoo Park ,  Srinivas Yerramalli ,  Wooseok Nam ,  Xiaoxia Zhang ,  Tao Luo ,  Jing Sun ,  Arumugam Chendamarai Kannan ,  Vinay Chande ,  Kaushik Chakraborty ,  Olufunmilola Omolade Awoniyi-Oteri ,  Sony Akkarakaran ,  Mostafa Khoshnevisan ,  Zhifei Fan

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

Abstract: Methods, systems, and devices for time domain single carrier (SC) waveform communications are described. A user equipment (UE) may generate an SC waveform by resampling (e.g., up-sampling) mapped information bits prior to insertion of a cyclic prefix (CP) or guard interval (GI). Performing resampling prior to CP/GI insertion allows for resource allocation flexibility and a base station may allocate resources for the SC waveform in accordance with this flexibility. For example, a base station may not be limited or restricted to a certain number of resources for SC waveform communications and may therefore determine a resource allocation for the UE based on the capability of the UE to perform resampling prior to CP/GI insertion. The resampling may be performed according to a set of parameters including a resampling ratio, which may be indicated to the UE via control signaling (e.g., from the base station).

公开(公告)号：US11115161B2

公开(公告)日：2021-09-07

申请号：US16400822

申请日：2019-05-01

Applicant: QUALCOMM Incorporated

Inventor： Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Aleksandar Damnjanovic ,  Tamer Kadous ,  Jing Sun ,  Yongbin Wei

IPC: H04L5/00 ,  H04W72/12 ,  H04W72/04 ,  H04W88/10 ,  H04W74/08 ,  H04L27/00 ,  H04W84/12

Abstract: Scheduling around frame based equipment (FBE) idle periods reduces the flexibility of scheduling and partitioning. This leads to a latency caused by waiting for the next downlink scheduling opportunity and skipping over unused uplink scheduling slots. According to certain aspects, to reduce overhead caused by idle time and ensure full downlink scheduling, a base station (BS) alternates between idle periods and channel occupancy time every fixed frame period with one or more other synchronized BSs, between components carriers of the BS, or both. Thus, a BS can always schedule downlink on a carrier during an idle period scheduled for a different BS and/or a different carrier.

公开(公告)号：US20210250992A1

公开(公告)日：2021-08-12

申请号：US17248451

申请日：2021-01-25

Applicant: QUALCOMM INCORPORATED

Inventor： Vinay Chande ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Jing Sun ,  Tao Luo

IPC: H04W74/04 ,  H04W72/04

Abstract: Methods related to wireless communications systems and medium access in a radio frequency band of a shared spectrum are provided. A device contends for a first reserved time interlace including a plurality of channel occupancy times (COTs). The device transmits a first communication signal in a first COT of the plurality of COTs in response to winning the first reserved time interlace. The device transmits a second communication signal in a second COT of the plurality of COTs, the second COT spaced in time from the first COT, in response to winning the first reserved time interlace.