公开(公告)号：US10356819B2

公开(公告)日：2019-07-16

申请号：US15230090

申请日：2016-08-05

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Yong Liu ,  Joonsuk Kim ,  Christiaan A. Hartman ,  Chiu Ngok E. Wong ,  Syed Aon Mujtaba ,  Matt Semersky ,  Su Khiong Yong

IPC: H04W74/08

Abstract: Disclosed herein are system, method, and computer program product embodiments for enabling a spatial reuse opportunity at a high efficiency (HE) station and a network allocation vector (NAV) reset capability at a legacy station using a Request to Send and/or Clear to Send (RTS and/or CTS) frame. For example, the method can include receiving a RTS frame with a redefined field that specifies spatial reuse information. The NAV can be set based on the RTS frame. The method can determine whether a second frame was received within a threshold time after a Short Interframe Space (SIFS). Finally, the method can reset the NAV based on whether the second frame was received within the threshold time.

公开(公告)号：US10306476B2

公开(公告)日：2019-05-28

申请号：US15498358

申请日：2017-04-26

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Christiaan A. Hartman ,  Jarkko Kneckt ,  Yong Liu ,  Su Khiong Yong ,  Joonsuk Kim ,  Oren Shani

IPC: H04L29/06 ,  H04L5/14 ,  H04L12/24 ,  H04W16/02 ,  H04W52/36 ,  H04W74/00 ,  H04W84/12 ,  H04W88/08 ,  H04L12/931

Abstract: An interface circuit in an electronic device may receive, from an access point associated with the electronic device, a frame with management information that enables the electronic device to use a spatial-reuse technique, where the electronic device, through the spatial-reuse technique, adjusts a transmit power and a channel-availability sensing threshold. Moreover, the management information may specify parameters for the spatial-reuse technique. Then, the electronic device may transmit, using the spatial-reuse technique, one or more frames to the access point based on the parameters. Furthermore, the electronic device may transmit, to the access point, feedback information that indicates communication performance during the communication between the electronic device and the access point. For example, the feedback information may include a retry rate and, more generally, communication-performance information. This feedback information may be used by the access point to modify the parameters.

公开(公告)号：US10285040B2

公开(公告)日：2019-05-07

申请号：US15605011

申请日：2017-05-25

Applicant: Apple Inc.

Inventor： Yong Liu ,  Christiaan A. Hartman ,  Guoqing Li ,  Lawrie Kurian ,  Peter N. Heerboth ,  Su Khiong Yong

IPC: H04W8/00 ,  H04W4/08 ,  H04W76/10 ,  H04W4/80 ,  H04W84/12

Abstract: In some embodiments, one or more wireless stations operate to configure direct communication with neighboring mobile stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. Embodiments of the disclosure relate to accelerated service discovery between peer devices. In some embodiments, a wireless device may broadcast a probe beacon on one or more discovery channels. The wireless device may then scan the discovery channels for an extended period of time. The wireless device may receive a response from a peer device and transmit further service information to the peer device in an availability window indicated in the response.

公开(公告)号：US10277424B2

公开(公告)日：2019-04-30

申请号：US15279260

申请日：2016-09-28

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Joonsuk Kim ,  Yong Liu ,  Christiaan A. Hartman ,  Su Khiong Yong

IPC: H04L25/02 ,  H04L5/00 ,  H04W84/12

Abstract: Time, frequency and waveform division multiplex schemes are used to efficiently estimate multiple uplink channels in a Wireless Local Area Network (WLAN). Orthogonal Frequency Division Multiple Access (OFDMA) and multi-user Multiple Input Multiple Output (MU-MIMO) approaches provide efficient uplink data transmission. An Access Point (AP) communicates with multiple Stations (STAs) in the WLAN. In some approaches, two or more STAs are addressed and the two or more STAs respond at the same time. The AP receives a composite signal and separates the responses to estimate the uplink channel from each STA. After the AP learns the uplink channels, the AP triggers data transmission from one or more of the WLAN STAs by sending a synchronizing trigger message. In some embodiments, the STAs respond simultaneously with data transmissions to the AP.

公开(公告)号：US10271293B2

公开(公告)日：2019-04-23

申请号：US13736725

申请日：2013-01-08

Applicant: Apple Inc.

Inventor： Pierre B. Vandwalle ,  Christiaan A. Hartman

IPC: H04W56/00 ,  H04L29/08 ,  H04W84/20

Abstract: A system, apparatus and method for organizing devices in a peer-to-peer communication environment. A number of devices synchronize among themselves and select masters (or synchronization stations) to organize the devices into a hierarchy. Master devices have associated preference values reflecting their preference or suitability to be a master device, and broadcast synchronization frames to keep devices synchronized. When multiple devices in one or more hierarchies execute a common application or service, they form a private group to exchange or share data (e.g., play a game, transfer a file). All devices in the hierarchy maintain and advertise a public or default identifier of the hierarchy, and all devices in the private group maintain and advertise a private identifier specific to the group. Members of the group synchronize under a top group master (or root sync station), which synchronizes with a master that is part of the hierarchy.

公开(公告)号：US20190082443A1

公开(公告)日：2019-03-14

申请号：US16128415

申请日：2018-09-11

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Christiaan A. Hartman ,  Daniel R. Borges ,  Jarkko L. Kneckt ,  Oren Shani ,  Tushar R. Shah ,  Xiaowen Wang ,  Yong Liu ,  Christian W. Mucke ,  Joseph Hakim ,  Farouk Belghoul ,  Ayman F. Naguib ,  Karan Sanghi ,  Cahya Adiansyah Masputra

IPC: H04W72/12 ,  H04W28/02

Abstract: An electronic device that determines a transmission schedule is described. This electronic device may include an interface circuit that communicates with a recipient electronic device. During operation, the electronic device may receive a frame with scheduling-request information that is associated with the recipient electronic device. The scheduling-request information may include a buffer status report for persistent traffic, and the frame may be compatible with an IEEE 802.11 communication protocol. For example, the frame may include a scheduling-request management frame. Alternatively, the frame may include a data frame and the scheduling-request information may be included in a media access control (MAC) frame header, such as a high-efficiency (HE) variant high-throughput (HT) control header. Then, the electronic device may determine the transmission schedule based at least in part on the scheduling-request information.

公开(公告)号：US20190069239A1

公开(公告)日：2019-02-28

申请号：US16024536

申请日：2018-06-29

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Yong Liu ,  Christiaan A. Hartman ,  Jarkko L. Kneckt ,  Oren Shani

IPC: H04W52/02 ,  H04W72/04 ,  H04W4/06

Abstract: The present disclosure describes an electronic device configured to concurrently transmit wake-up radio (WUR) packets in a duplicated WUR transmission mode, non-duplicated WUR transmission mode, and/or mixed WUR transmission mode in one or more channels of a wideband basic service set (BSS) communication. Receiving electronic devices may be grouped together and assigned to monitor for the WUR packets. For example, the receiving electronic devices may be assigned to a position within the one or more channels to monitor for the WUR packets.

公开(公告)号：US10212574B2

公开(公告)日：2019-02-19

申请号：US15074848

申请日：2016-03-18

Applicant: Apple Inc.

Inventor： Yong Liu ,  Christiaan A. Hartman ,  Daniel R. Borges ,  Peter Heerboth ,  Lawrie Kurian ,  Su Khiong Yong ,  Anand Rajagopalan ,  Saravanan Balasubramaniyan ,  Tashbeeb Haque ,  Andreas Wolf ,  Guoqing Li ,  Lilach Zukerman ,  Oren Shani

IPC: H04W72/12 ,  H04W8/00 ,  H04W84/12 ,  H04W92/18 ,  H04W28/18

Abstract: In some embodiments, one or more wireless stations operate to configure Neighbor Awareness Networking (NAN)—direct communication between neighboring wireless stations, e.g., without utilizing an intermediate access point. Embodiments of the disclosure relate to NAN datapath configuration. The NAN datapath embodiments described herein provide a mechanism through which devices can communicate and provide services. Aspects of the datapath development include datapath scheduling, including datapath setup and scheduling attributes, scheduler rank management, and further NAN discovery. The datapath model may be implemented for unicast and multicast communication between wireless stations.

公开(公告)号：US10206190B2

公开(公告)日：2019-02-12

申请号：US15270810

申请日：2016-09-20

Applicant: Apple Inc.

Inventor： Robert J. Stacey ,  Pierre B. Vandwalle ,  Christiaan A. Hartman

IPC: H04W4/80 ,  H04L29/08 ,  H04W56/00 ,  H04W72/12 ,  H04W84/20

Abstract: A system, apparatus and method for selecting one or more synchronization stations, or masters, in a peer-to-peer communication environment. Synchronization (or sync) stations broadcast periodic synchronization frames to advertise future availability windows, during which devices rendezvous for discovery and communication. Devices that can act as sync stations advertise preference values, which indicate their preference or suitability for the role. All devices execute the same algorithm to sort the preference values and identify a root sync station and any number of branch sync stations; leaf devices synchronize with the root or a branch sync station. This passive synchronization scheme allows individual devices to conserve power, because they need not actively discover other devices and services, and can power off their radios for periods of time without sacrificing discoverability. Synchronization and peer-to-peer communication as provided herein coexist with other device demands, such as Bluetooth® operations and infrastructure-based communications.

公开(公告)号：US20190014541A1

公开(公告)日：2019-01-10

申请号：US16012935

申请日：2018-06-20

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Oren Shani ,  Yong Liu ,  Xiaowen Wang ,  Yoel Boger ,  Christiaan A. Hartman ,  Christian W. Mucke ,  Tushar R. Shah ,  Matthew L. Semersky ,  Josef Peery

IPC: H04W52/02 ,  H04B1/00 ,  H04B17/336

Abstract: An interface circuit in a device, e.g., an access point, may perform link adaptation. During operation, the interface circuit may provide a wake-up frame, e.g., a LP-WUR packet, associated with a channel in a band of frequencies, where the wake-up frame is intended for a wake-up radio in a recipient device. Then, the interface circuit may receive, from the recipient device, feedback information associated with a second channel in a second band of frequencies, where the feedback information is associated with a main radio in the recipient device. Based at least in part on the feedback information, the interface circuit may estimate one or more communication metrics associated with the channel in the band of frequencies. Moreover, based at least in part on the one or more communication metrics, the interface circuit may determine a data rate for use in communication via the channel in the band of frequencies.