公开(公告)号：US10554262B2

公开(公告)日：2020-02-04

申请号：US15975995

申请日：2018-05-10

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Sony Akkarakaran ,  Rahul Malik ,  Kaushik Chakraborty

IPC: H04B7/0408 ,  H04B7/0413 ,  H04W72/04 ,  H04B7/08 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a first sub-band and a second sub-band of a system bandwidth for communication with a user equipment (UE). The base station may determine a spatial quasi co-location (QCL) relationship between the first sub-band and the second sub-band and may transmit signaling to the UE that indicates the determined spatial QCL relationship. Upon receiving the signaling, the UE may derive, based on the indicated spatial QCL relationship, spatial parameters (e.g., beam width, pointing angle, etc.) for communication with the base station via the second sub-band. The spatial parameters may be derived based on spatial parameters used for reception of a downlink transmission from the base station via the first sub-band. Subsequently, the UE may communicate with the base station via the second sub-band using the derived spatial parameters.

公开(公告)号：US10379196B2

公开(公告)日：2019-08-13

申请号：US15191498

申请日：2016-06-23

Applicant: QUALCOMM Incorporated

Inventor： Carlos Horacio Aldana ,  Jeff Smith ,  Xiaoxin Zhang ,  Chia-Hui Lin ,  Yen-Feng Lee ,  Ravi Gidvani ,  Alecsander Eitan ,  Rahul Malik

IPC: G01S5/00 ,  H04W4/02 ,  G01S5/02 ,  H04W24/10 ,  H04W88/02 ,  H04W84/12

Abstract: Disclosed embodiments facilitate wireless channel calibration, ranging, and direction finding, between networked devices. A method on a first station (STA) may comprise: broadcasting, at a first time, a first NDPA frame to a plurality of second STAs. The first NDPA frame may include a first bit indicating that one or more subsequent frames comprise ranging or angular information. After a Short Interval Frame Space (SIFS) time interval from the first time, a second frame may be broadcast. The second frame may be a Null Data Packet (NDP) frame. In response, a plurality of Compressed Beamforming (CBF) frames may be received at the first STA where each CBF frame may be received from a distinct corresponding second STA, and may include Channel Feedback Information field with information pertaining to communication channel between the first STA and the corresponding second STA. The communications may be encoded using Orthogonal Frequency Division Multiple Access.

公开(公告)号：US20190208549A1

公开(公告)日：2019-07-04

申请号：US16228341

申请日：2018-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Rahul Malik ,  Srinivas Yerramalli

IPC: H04W74/08 ,  H04W48/16 ,  H04W16/14

CPC classification number: H04W74/0833 ,  H04L5/0048 ,  H04W16/14 ,  H04W48/16 ,  H04W88/02

Abstract: A joint low-band and high-band operation is disclosed for use in new radio (NR) shared spectrum (NR-SS) networks. In such networks, uplink and downlink communications may occur over separate bands, selected based on performance or quality characteristics. A user equipment (UE) may search each of one or both of a low-band spectrum and a high-band spectrum for system information signal that includes both a low-band random access configuration and a high-band random access configuration. The UE transmits a random access request on one of the bands and receives the random access response from one or more cells on the other band. The UE continues the random access procedure, transmitting the uplink message based on the random access response on the first band to a selected cell. The UE would then receive the contention resolution message from the selected cell on the second band.

公开(公告)号：US20190089443A1

公开(公告)日：2019-03-21

申请号：US16118284

申请日：2018-08-30

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli ,  Tamer Kadous ,  Kaushik Chakraborty

IPC: H04B7/06 ,  H04B7/0404

Abstract: Methods, systems, and devices for wireless communications are described that provide for refinement of receive beam beamforming parameters at a user equipment (UE). A UE may transmit two or more signals in an uplink transmission that have different beamforming parameters. A base station receiving the uplink transmission may measure the two or more signals, and identify a first signal of the two or more signals based at least in part on the measuring. The base station may inform the UE of the identified first signal, which the UE may use to set receive beam beamforming parameters for one or more subsequent downlink transmissions.

公开(公告)号：US20190069228A1

公开(公告)日：2019-02-28

申请号：US16109241

申请日：2018-08-22

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli

IPC: H04W48/16 ,  H04W24/10 ,  H04L5/00 ,  H04W72/04 ,  H04W24/02

Abstract: Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support multi-band operation. Different frequency bands may experience different communication characteristics (e.g., frequency-dependent fading), which may result in undesirable interference patterns and/or coverage gaps. The described techniques provide for discovery procedures for multi-band operation. The discovery procedures may allow for improved throughput, improved energy efficiency, reduced signaling overhead, as well as other benefits for a wireless communications system. Generally, the described techniques provide for efficient discovery reference signal (DRS) transmissions over multiple frequency bands. The timing of the DRS transmissions across the different bands may be related or the DRS transmission timing for each band may be determined independently.

公开(公告)号：US20180331727A1

公开(公告)日：2018-11-15

申请号：US15975995

申请日：2018-05-10

Applicant: QUALCOMM Incorporated

Inventor： Makesh Pravin John Wilson ,  Tao Luo ,  Sony Akkarakaran ,  Rahul Malik ,  Kaushik Chakraborty

IPC: H04B7/0408 ,  H04B7/0413 ,  H04B7/06 ,  H04W72/04 ,  H04B7/08

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a first sub-band and a second sub-band of a system bandwidth for communication with a user equipment (UE). The base station may determine a spatial quasi co-location (QCL) relationship between the first sub-band and the second sub-band and may transmit signaling to the UE that indicates the determined spatial QCL relationship. Upon receiving the signaling, the UE may derive, based on the indicated spatial QCL relationship, spatial parameters (e.g., beam width, pointing angle, etc.) for communication with the base station via the second sub-band. The spatial parameters may be derived based on spatial parameters used for reception of a downlink transmission from the base station via the first sub-band. Subsequently, the UE may communicate with the base station via the second sub-band using the derived spatial parameters.

公开(公告)号：US10104635B2

公开(公告)日：2018-10-16

申请号：US15257824

申请日：2016-09-06

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Ravi Hiranand Gidvani ,  Carlos Horacio Aldana

IPC: H04H20/71 ,  H04W64/00 ,  H04W56/00 ,  H04W4/06 ,  H04W84/12 ,  H04L27/26

Abstract: Disclosed embodiments pertain to a first STA may broadcast a first Null Data Packet Announcement (NDPA) frame with an indication of one or more second STAs being polled. Subsequent to the first NDPA frame, a Null Data Packet (NDP) frame may be broadcast from a plurality of antennas on the first STA and one or more corresponding first Fine Timing Measurement (FTM) frames may be received in response. Each corresponding first FTM frame may be received from a distinct corresponding second STA and may comprise corresponding ranging measurements between the first STA and the corresponding second STA as determined by the corresponding second STA based on the NDP frame. In some embodiments, the one or more corresponding first FTM frames may be: received in response to a previously broadcast trigger frame, and encoded using Orthogonal Frequency Division Multiple Access. The trigger frame may be broadcast subsequent to the NDP frame.

公开(公告)号：US20180287568A1

公开(公告)日：2018-10-04

申请号：US15897073

申请日：2018-02-14

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Bo Li

IPC: H03F1/32 ,  H04L25/02 ,  H03F3/191

Abstract: This disclosure provides systems, methods and apparatuses for compensating for differences in path delays and phase offsets between receive paths of a wireless device. In one aspect, a device receives a first wireless signal using first and second receive paths, determines a first channel phase response of the first wireless signal as received by the first receive path, and determines a second channel phase response of the first wireless signal as received by the second receive path. The device compares the first and second channel phase responses with an expected channel phase response, and determines, for each of the first receive path and the second receive path, one or more phase correction values based on the comparison. The device adjusts the first and second channel phase responses based on the phase correction values.

公开(公告)号：US20180279212A1

公开(公告)日：2018-09-27

申请号：US15659405

申请日：2017-07-25

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Tamer Kadous

IPC: H04W48/16 ,  H04W48/20

CPC classification number: H04W48/16 ,  H04W48/08 ,  H04W48/14 ,  H04W48/18 ,  H04W48/20 ,  H04W74/0808

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive network search information related to the accessible bands. In some examples, the UE may receive network search information from a server that has access to the network search information. The UE may receive the network search information directly from the server or through another wireless device. In other examples, a base station may broadcast network search information on an anchor carrier. The UE may tune to a carrier of a first radio access network to receive the network search information and use the network search information to assist connecting to a second radio access network. The network search information may include, for example, a network name or network ID, a technology type, band or channel information, security information or credentials.

公开(公告)号：US20180279156A1

公开(公告)日：2018-09-27

申请号：US15914844

申请日：2018-03-07

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Tamer Kadous

IPC: H04W28/02 ,  H04B7/155 ,  H04W72/08 ,  H04W72/12 ,  H04W72/04 ,  H04W74/00 ,  H04W84/04 ,  H04W28/26

Abstract: Methods, systems, and devices for wireless communication are described. A first device may receive a channel reservation request from a second device, over a shared or unlicensed radio frequency spectrum band, the channel reservation request including a first expected response time duration to receive a channel reservation response in response to the channel reservation request. The first wireless device may transmit a channel reservation response in response, and receive a directional transmission according to the channel reservation request. The second device may transmit a directional channel reservation request on a transmit beam, the directional channel reservation request including a first expected response time duration to receive a channel reservation response the first device in response to the directional channel reservation request. The second device may receive the channel reservation response during the first expected response time duration and transmit a directional transmission according to the directional channel reservation request.