公开(公告)号：US20140335891A1

公开(公告)日：2014-11-13

申请号：US14272844

申请日：2014-05-08

Applicant: QUALCOMM INCORPORATED

Inventor： Xiaoxin Zhang ,  Carlos Horacio Aldana ,  Sandip Homchaudhuri ,  James Simon Cho

IPC: H04W64/00

CPC classification number: H04W64/003 ,  G01S5/0205 ,  H04W64/00

Abstract: This disclosure includes systems and methods for determining the location of each of a plurality of STAs of a WLAN where an AP measures the round-trip time (RTT) and the angle of arrival (AOA) to each STA from implicit packet exchange, such as data frame and ACK frame. The AP may then report the RTT and AOA measurements to each STA using a dedicated beacon information element (IE) which multicasts RTT and AOA measurements to the STAs. By employing an additional parameter, namely, angle of arrival AOA, a single AP may compute the two-dimensional location of each associated STA. Further, another beacon IE may multicast mapping of the AIDs to MAC addresses so that the associated STAs can understand such mapping for STAs in a network so that one STA may know the location of other STAs. Encryption may be employed to achieve privacy.

Abstract translation: 本公开包括用于确定WLAN的多个STA中的每一个的位置的系统和方法，其中AP从隐式分组交换测量到每个STA的往返时间（RTT）和到达角（AOA），例如 数据帧和ACK帧。 然后，AP可以使用将RTT和AOA测量多播到STA的专用信标信息元素（IE）向每个STA报告RTT和AOA测量。 通过采用附加参数，即到达角AOA，单个AP可以计算每个相关STA的二维位置。 此外，另一个信标IE可以将AID多播到MAC地址，使得相关联的STA可以理解网络中的STA的这种映射，使得一个STA可以知道其他STA的位置。 可以采用加密来实现隐私。

公开(公告)号：US20140269400A1

公开(公告)日：2014-09-18

申请号：US13826116

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Carlos Horacio ALDANA ,  Vinay Sridhara ,  Sven Fischer ,  Hui Chao ,  Sandip Homchaudhuri ,  James Simon Cho ,  Xiaoxin Zhang

IPC: H04W24/08

CPC classification number: H04W64/00 ,  G01S5/0081 ,  G01S5/0236 ,  G01S5/0242 ,  H04W48/12

Abstract: A method and apparatus for broadcasting short interframe space information to aid in determining a round trip time are provided. The round trip time is used as an aid in locating nodes within a WiFi or WLAN network. The method begins with capturing a time of transmission of a frame by a transmitting station. The receiving station then captures the time of arrival of the frame just sent by the transmitting station. The receiving station replies with a received frame message and the time of departure is captured. The transmitting station then captures the time of arrival of the received frame message. The captured arrival and departure times of the frame and the received frame message allow the round trip time to be computed. The RTT may then be included as part of a network message.

Abstract translation: 提供了一种用于广播短帧间空间信息以帮助确定往返时间的方法和装置。 往返时间用于帮助定位WiFi或WLAN网络中的节点。 该方法开始于通过发送站捕获帧的传输时间。 接收站然后捕获发送站刚刚发送的帧的到达时间。 接收站用接收到的帧消息进行回复，并且捕获出发的时间。 然后，发送站捕获所接收的帧消息的到达时间。 所捕获的到达和离开时间帧和接收到的帧消息允许计算往返时间。 然后可以将RTT包括为网络消息的一部分。

公开(公告)号：US12177911B2

公开(公告)日：2024-12-24

申请号：US18488311

申请日：2023-10-17

Applicant: QUALCOMM Incorporated

Inventor： Qi Xue ,  Srinivas Katar ,  Chao Zou ,  Naveen Gangadharan ,  Neelakantan Nurani Krishnan ,  Sandip Homchaudhuri ,  Xiaolong Huang ,  Anish Ashok

IPC: H04L65/40 ,  G06T7/20 ,  G06T7/70 ,  G06T11/00 ,  H04L67/131 ,  H04W56/00 ,  H04W74/08

Abstract: This disclosure provides systems, methods and apparatus for synchronous channel access control of a wireless system. In some aspects, a device may use a TWT session to communicate with a second device during one or more TWT service periods. Uplink and downlink communications may be coordinated to both be in a TWT service period to allow a device to enter a low power mode outside of the TWT service period. The TWT session, including the service periods, may be configured and managed by the device or the second device to ensure the communications associated with an XR experience between the devices (such as pose data frames or tracking frames provided as uplink data and video data frames provided as downlink data) meet latency requirements or other requirements for the XR experience. Use of TWT service periods allows other devices to use the wireless medium outside of the TWT service periods.

公开(公告)号：US20240098549A1

公开(公告)日：2024-03-21

申请号：US17934155

申请日：2022-09-21

Applicant: Qualcomm Incorporated

Inventor： Xiaolong HUANG ,  Manish Shukla ,  Srinivas Katar ,  Sandip Homchaudhuri ,  Simon Jan Brand ,  Harinder Singh ,  Tejaswini Gollamudi ,  Qinfang Sun

IPC: H04W28/02

CPC classification number: H04W28/0231 ,  H04W84/12

Abstract: Aspects of the present disclosure allow for improving E2E mesh throughput by applying transmission (TX) biasing on the Wi-Fi mesh backhaul. Aspects of the disclosure are directed to solutions for reducing traffic load in Wi-Fi mesh networks by applying TX biasing on the Wi-Fi mesh backhaul. Certain aspects are directed to selectively transmitting or preventing transmission of data over the first backhaul link to the first MLD based at least in part on a fronthaul airtime utilization, a first backhaul airtime utilization, or a second backhaul airtime utilization. Doing so allows a root access point or a network controller to apply TX biasing between multi-link operation links towards each repeater so that traffic load on a backhaul-link would not overly occupy the front-haul link because of common channel use by selectively transmitting or preventing transmission of data on the backhaul links.

公开(公告)号：US10231179B2

公开(公告)日：2019-03-12

申请号：US15051403

申请日：2016-02-23

Applicant: QUALCOMM Incorporated

Inventor： Sandip Homchaudhuri ,  Youhan Kim ,  Srinivas Jasti ,  Sunghun Choi ,  Vikram Phogat ,  Ye Yuan ,  Umang Sureshbhai Patel ,  Lian Chen ,  Sumeet Kumar ,  James Simon Cho ,  Sreepathy Aida ,  Zhanfeng Jia ,  Pradeep Kumar Yenganti

IPC: H04W52/02 ,  H04B7/06 ,  H04B7/08 ,  H04B7/00

Abstract: Systems and methods for wireless communications are disclosed. More particularly, aspects generally relate to an apparatus for wireless communications. The apparatus generally includes an interface for communicating with a plurality of wireless nodes via a plurality of antennas, and a processing system configured to determine a power state of each of the plurality of wireless nodes, and change from a first antenna mode used for communicating with the wireless nodes using a first number of spatial streams to a second antenna mode used for communicating with the wireless nodes using a second number of spatial streams, based on the determined power states of the wireless nodes.

公开(公告)号：US10129120B2

公开(公告)日：2018-11-13

申请号：US15625671

申请日：2017-06-16

Applicant: QUALCOMM Incorporated

Inventor： Carlos Horacio Aldana ,  Sandip Homchaudhuri ,  Xin He ,  Xiaoxin Zhang ,  Ashish Kumar Shukla

IPC: H04L12/26 ,  G01S5/00 ,  G01S5/06 ,  H04W64/00

Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.

公开(公告)号：US09923792B2

公开(公告)日：2018-03-20

申请号：US15281412

申请日：2016-09-30

Applicant: QUALCOMM Incorporated

Inventor： Carlos Horacio Aldana ,  Sandip Homchaudhuri ,  Xin He ,  Xiaoxin Zhang ,  Ashish Kumar Shukla

IPC: H04L12/26 ,  H04B7/216 ,  H04W64/00 ,  G01S5/00 ,  G01S13/76 ,  H04W24/00 ,  H04W4/04 ,  H04L5/00 ,  H04W76/02 ,  H04W72/08

CPC classification number: H04L43/0864 ,  G01S5/00 ,  G01S13/767 ,  H04L5/005 ,  H04W4/043 ,  H04W4/30 ,  H04W24/00 ,  H04W64/00 ,  H04W72/082 ,  H04W76/10

Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.

公开(公告)号：US09820229B2

公开(公告)日：2017-11-14

申请号：US13954035

申请日：2013-07-30

Applicant: QUALCOMM Incorporated

Inventor： Sandip Homchaudhuri ,  Joseph Duncan ,  Xiaoru Zhang ,  MeeLan Lee ,  Arunkumar Jayaraman ,  Derrick Chu Lin ,  Srenik Mehta

IPC: H04W52/02 ,  G06F1/32

CPC classification number: H04W52/0229 ,  G06F1/3206 ,  G06F1/324 ,  G06F1/3296 ,  H04W52/0216 ,  H04W52/029 ,  Y02D10/126 ,  Y02D10/172 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/23 ,  Y02D70/24

Abstract: Methods and apparatuses are described in which dynamic voltage and frequency scaling may be used to save power when processing packets in a wireless communications device. In some cases, inframe detection may allow the device to determine whether to transition from a first (e.g., lower) voltage level to a second (e.g., higher) voltage level to process one or more packets of a received frame. For some packet types the first voltage level may be maintained. In other cases, the device may determine a bandwidth to use from among multiple bandwidths supported by the device. The bandwidth may be determined based on channel conditions. A voltage level may be identified that corresponds to the determined bandwidth and a processing voltage may be scaled to the identified voltage level. The device may be configured to operate in wireless local area network (WLAN) and/or in a cellular network (e.g., LTE).

公开(公告)号：US20170310570A1

公开(公告)日：2017-10-26

申请号：US15625671

申请日：2017-06-16

Applicant: QUALCOMM Incorporated

Inventor： Carlos Horacio Aldana ,  Sandip Homchaudhuri ,  Xin He ,  Xiaoxin Zhang ,  Ashish Kumar Shukla

IPC: H04L12/26 ,  G01S5/00 ,  G01S5/06 ,  H04W64/00

CPC classification number: H04L43/0864 ,  G01S5/00 ,  G01S13/767 ,  H04L5/005 ,  H04W4/043 ,  H04W4/30 ,  H04W24/00 ,  H04W64/00 ,  H04W72/082 ,  H04W76/10

Abstract: Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.

公开(公告)号：US09781673B2

公开(公告)日：2017-10-03

申请号：US14287670

申请日：2014-05-27

Applicant: QUALCOMM Incorporated

Inventor： Sandip Homchaudhuri ,  Paul Husted ,  MeeLan Lee ,  Srenik Mehta ,  Kai Shi ,  Shahram Abdollahi-Alibeik ,  Zhanfeng Jia ,  Soraya Kasnavi ,  Ning Zhang ,  David Kuochieh Su ,  Subramania Sharma Thandaveswaran ,  Kenneth Gainey ,  Ian David O'Donnell

IPC: G06F1/32 ,  H04W52/02

CPC classification number: H04W52/0235 ,  G06F1/3206 ,  G06F1/3234 ,  H04W52/0229 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/22

Abstract: Methods, systems, and devices are described for power conservation in a wireless communications system. In embodiments, power conservation may be achieved by adaptively controlling power modes of a wireless communication device, and implementing lower power modes with various modes of the device. According to one aspect, the mode of the device may be a beacon monitoring mode or a delivery traffic indication message (DTIM) mode. In such a mode, the device may receive a portion of a beacon in a first power mode. The device may transition to a second, different (e.g., higher) power mode using information contained in the received portion of the beacon as guidance.