公开(公告)号：US11304182B2

公开(公告)日：2022-04-12

申请号：US16341224

申请日：2016-12-07

Applicant: Qualcomm Incorporated

Inventor： Peng Cheng ,  Chirag Patel ,  Vinay Chande ,  Tamer Kadous

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

Abstract: Methods, systems, and devices for wireless communication are described. Various autonomous uplink control channel configurations may be used for unscheduled uplink transmissions. For example, a user equipment (UE) may initiate an unscheduled uplink transmission and may identify an autonomous uplink control channel configuration for the uplink transmission. The UE may transmit control information and data during an initial transmission time interval of a transmission opportunity according to the control channel configuration, where the control channel configuration control may include a number of different waveforms and payload configurations. For example, an autonomous uplink control channel configuration may include control information frequency division multiplexed or time division multiplexed with data and transmitted in one or more frequency interlaces. In some cases, the control channel configuration may include a symbol period for a clear-to-send signal, and one or more symbol periods used a guard period before the data transmission.

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：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：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.

公开(公告)号：US20210251004A1

公开(公告)日：2021-08-12

申请号：US17160058

申请日：2021-01-27

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W24/08 ,  H04W16/28

Abstract: Systems and methods implementing receiver assisted channel access procedures configured to enable access for a potential transmitter while avoiding introducing unacceptable interference with respect to ongoing communications in a shared channel are described. In examples, a receiver assisted channel access procedure implements a LBT enhanced CCA (eCCA) technique in which receiver assisted transmitter sensing is utilized. A receiver assisted channel access procedure may implement monitoring of a shared channel during a contiguous contention period for one or more instances of a periodic session protection signal.

公开(公告)号：US20210251002A1

公开(公告)日：2021-08-12

申请号：US17248733

申请日：2021-02-04

Applicant: QUALCOMM INCORPORATED

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

IPC: H04W74/08 ,  H04W16/14 ,  H04W16/28 ,  H04W52/24

Abstract: Methods related to wireless communications systems and transmissions in an unlicensed radio frequency band of a shared spectrum are provided. A device determines whether one or more criteria are satisfied for accessing an unlicensed band of a shared spectrum without performing a listen-before-talk (LBT). The device transmits a communication signal in the unlicensed band without performing LBT in response to determining that the one or more criteria are satisfied.

公开(公告)号：US11064518B2

公开(公告)日：2021-07-13

申请号：US16135500

申请日：2018-09-19

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Ahmed Kamel Sadek ,  Vinay Chande ,  Sanaz Barghi ,  Tamer Kadous

IPC: H04W74/00 ,  H04W74/08 ,  H04B7/0408 ,  H04B7/06 ,  H04W72/04 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communications are described. A base station may perform a channel access procedure on a shared radio frequency spectrum band using a first beam configuration. The base station may transmit, based at least in part on successful completion of the channel access procedure, a reservation request message (RRQ) to a user equipment (UE) using a second beam configuration, the second beam configuration comprising a beam width that is equal to or narrower than a beam width of the first beam configuration. The base station may receive a reservation response message (RRS) from the UE in response to the RRQ, the RRS comprising a third beam configuration that is based at least in part on the second beam configuration.

公开(公告)号：US20210176783A1

公开(公告)日：2021-06-10

申请号：US17108453

申请日：2020-12-01

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Jing Sun ,  Arumugam Chendamarai Kannan ,  Vinay Chande ,  Giovanni Chisci ,  Hua Wang

IPC: H04W74/08 ,  H04W16/14 ,  H04W24/10

Abstract: Enhanced measurements for new radio-unlicensed (NR-U) operations are disclosed. Compatible user equipments (UEs) may be configured to perform virtual full listen before talk (LBT) procedures for measurement purposes. The UEs may then compile LBT statistics derived from the virtual LBT procedures and include such statistics in an enhanced measurement report the their serving base stations. The LBT statistics provide a more direct and detailed reflection of the usage of a shared communication channel. Such UEs may further be configured to gather additional LBT statistics from transmission-based LBT procedures in addition to the virtual LBT procedures. The additional direct and detailed usage of a shared channel may then be provided in the enhanced measurement reports in accordance with described aspects.

公开(公告)号：US20200383118A1

公开(公告)日：2020-12-03

申请号：US16855866

申请日：2020-04-22

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/08 ,  H04W24/08 ,  H04W72/04 ,  H04W16/28 ,  H04W56/00 ,  H04W80/02 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) in communication with a serving base station may identify that the UE is a potential victim of interference from a neighboring base station. The UE may transmit an interference coordination message to the neighboring base station. The interference coordination message may request modification of one or more transmission parameters at the neighboring base station. The neighboring base station may modify its transmission parameters to decrease interference with the UE, and the UE may communicate with the serving base station after transmitting the interference coordination message.