公开(公告)号：US11229061B2

公开(公告)日：2022-01-18

申请号：US16880607

申请日：2020-05-21

Applicant: QUALCOMM Incorporated

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

IPC: H04W16/28 ,  H04W74/08 ,  H04W72/04 ,  H04W52/30

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device, such as a base station or a user equipment, may identify an energy detection threshold for a sensing beam associated with a channel access procedure, such as a listen-before-talk (LBT) procedure. The wireless device may also identify a set of transmit power parameters for one or more transmit beams. The wireless device may determine a degree of overlap between a beam shape of one or more transmit beams and a beam shape (e.g., a coverage area) of the sensing beam. The wireless device may adjust the set of transmit power parameters, the energy detection threshold, or a combination thereof based on the degree of overlap. The wireless device may perform the channel access procedure based on the determining, the adjusting, or both.

公开(公告)号：US20210409180A1

公开(公告)日：2021-12-30

申请号：US17469747

申请日：2021-09-08

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: H04L5/00 ,  H04W72/04 ,  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：US11212802B2

公开(公告)日：2021-12-28

申请号：US16698378

申请日：2019-11-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli

IPC: H04W72/04 ,  H04W16/14 ,  H04W74/08

Abstract: A wireless communication system may allocate uplink resources to configure coexisting interleaved and contiguous uplink transmissions. Operation using different waveform types may address bandwidth occupancy requirements, power spectral density (PSD) limitations, etc. A carrier bandwidth may be split into regions allocated for interlaced resource allocations and contiguous resource allocations for frequency division multiplexing (FDM) based coexistence. To achieve coexistence of such waveform types, a base station may indicate a waveform type, a transmission carrier bandwidth or channel, and a resource block allocation (e.g., an interlace pattern, certain ranges within the carrier bandwidth, etc.) for uplink transmissions. In some cases, channel contention procedures (e.g., Listen Before Talk (LBT)) and power constraints (e.g., power spectral density (PSD) limitations) may be based on the waveform type associated with the uplink transmission. A base station may allocate frequency resources of an uplink TTI to multiple UEs, which may operate according to different waveform types.

公开(公告)号：US11212051B2

公开(公告)日：2021-12-28

申请号：US16292293

申请日：2019-03-04

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Jing Sun ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Tamer Kadous ,  Yongbin Wei ,  Tao Luo

IPC: H04L5/00 ,  H04W74/08 ,  H04W24/10 ,  H04W72/14 ,  H04W56/00 ,  H04B7/08 ,  H04B7/06

Abstract: Beam-specific autonomous uplink (AUL) resources may be configured with an associated reference signal for beam management. For example, a base station may configure respective sets of AUL resources that are specific to one or more base station receive beams. These sets of beam-specific AUL resources may be configured to be associated (e.g., quasi co-located (QCL)) with a reference signal, such as a channel state information reference signal (CSI-RS), a synchronization signal burst (SSB), or the like. The base station may periodically transmit the reference signals that are associated with the AUL resources. A user equipment (UE), upon detecting one or more of the reference signals, may identify which set of AUL resources are available for an AUL transmission of uplink data. In such cases, the UE may select a set of AUL resources based on a signal strength of the reference signal associated with that set of AUL resources.

公开(公告)号：US11172502B2

公开(公告)日：2021-11-09

申请号：US16534826

申请日：2019-08-07

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/14 ,  H04W74/00 ,  H04W28/26 ,  H04W72/10 ,  H04W16/14 ,  H04W74/08 ,  H04L5/00 ,  H04L1/00 ,  H04W72/04 ,  H04L1/18 ,  H04W28/08

Abstract: Uplink scheduling for license assisted access (LAA) mode systems is discussed in which a user equipment (UE) receives a conditional grant from a serving base station that includes a transmission configuration for an uplink transmission. The UE also receives an uplink activation grant over a contention-based shared carrier. The uplink activation grant activates the uplink transmission associated with the conditional grant. Thereafter, the UE transmits the uplink transmission over the contention-based shared carrier according to the transmission configuration.

公开(公告)号：US20210329414A1

公开(公告)日：2021-10-21

申请号：US17221615

申请日：2021-04-02

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/029 ,  H04L5/00 ,  G01S5/02

Abstract: A wireless network including user equipment (UE) and base stations is configured to perform position determination with low latency and synchronized to a common time within a wireless network. The UE and base stations are configured to perform positioning measurements at a specific time point or within a window around the time point in a measurement period. The time point may be relative to a timing event within the wireless network, such as the beginning or end of a positioning reference signal window or a specific message in a layer 1 or layer 2 transmission. 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 within the measurement period.

公开(公告)号：US20210307063A1

公开(公告)日：2021-09-30

申请号：US17249611

申请日：2021-03-05

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to communications in a network are provided. A first wireless communication device may perform in a shared radio frequency band during a first portion of a frame period, a first listen-before-talk (LBT) using a first beam characteristic. Additionally, the first wireless communication device may perform in the shared radio frequency band during a second portion of the frame period, a second LBT using a second set of beam characteristics different from the first beam characteristic. The first wireless communication device may communicate with a second wireless communication device in the shared radio frequency band during the second portion of the frame period, one or more communication signals using the second set of beam characteristics. Other aspects and features are also described.

公开(公告)号：US11122596B2

公开(公告)日：2021-09-14

申请号：US16800233

申请日：2020-02-25

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04L5/00 ,  H04L12/28 ,  H04L12/54 ,  H04L29/06 ,  H04W28/02 ,  H04L5/14

Abstract: A user equipment (UE) may transmit a sounding reference signal (SRS) on a component carrier (CC) that is otherwise configured for downlink communications. Due to a carrier aggregation configuration or UE capability, the UE may need to retune certain components to transmit on the CC. If the SRS transmission, including the retuning time, collides with another transmission the UE may drop the SRS, drop the other transmission, or puncture the other transmission to facilitate the SRS transmission. The determination about a collision may depend on the retuning time, channel, or type of control information in the other transmission. In some cases, a UE may drop the other transmission if transmitting the SRS would prevent the UE from transmitting a demodulation reference signal, hybrid automatic repeat request (HARQ) feedback. In some cases, the determination may be based upon a prioritization and may also depend on a subsequent subframe.

公开(公告)号：US20210273675A1

公开(公告)日：2021-09-02

申请号：US17324651

申请日：2021-05-19

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/713 ,  H04W72/04 ,  H04B7/26 ,  H04L12/413 ,  H04L5/00 ,  H04L12/46

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a discovery reference signal from a base station on an anchor channel. The UE may perform a first random or pseudorandom frequency hopping procedure to identify a plurality of downlink carriers for a first time period. The UE may perform a second random or pseudorandom frequency hopping procedure within the plurality of downlink carriers to select one of the plurality of downlink carriers as the uplink channel for a second time period. The UE may then transmit an uplink communication during the second time period on the selected uplink channel. In some examples, the uplink communication may be transmitted based at least in part on time division multiplexing (TDM) information.

公开(公告)号：US20210266961A1

公开(公告)日：2021-08-26

申请号：US17178549

申请日：2021-02-18

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04L5/00 ,  H04W72/04

Abstract: A method of wireless communication includes performing, by a user equipment (UE) device, a channel sensing operation during a first window of a frame period associated with a wireless communication network. Performing the channel sensing operation includes performing a direction-based scan of one or more beams associated with the wireless communication network, and the channel sensing operation is included in a joint sensing operation performed with a base station. The method further includes, based at least in part on a result of the channel sensing operation, determining whether to perform, during a second window of the frame period, one or more communication operations with the base station.