公开(公告)号：US20180092109A1

公开(公告)日：2018-03-29

申请号：US15711061

申请日：2017-09-21

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  Paul V. Flynn ,  Louie J. Sanguinetti ,  Bernd W. Adler ,  Christian W. Mucke ,  Joseph Hakim ,  Ronald W. Dimpflmaier ,  Matthias Sauer ,  Tushar R. Shah ,  Daniel R. Borges ,  Rafael L. Rivera-Barreto ,  Cesar Perez

IPC: H04W72/12 ,  H04W16/14 ,  H04W72/04 ,  H04W72/08 ,  H04B7/06

CPC classification number: H04W72/1215 ,  H04B7/0632 ,  H04W16/14 ,  H04W24/10 ,  H04W72/0446 ,  H04W72/085 ,  H04W74/06 ,  H04W74/0816 ,  H04W88/06

Abstract: A wireless communication device (UE) includes a cellular processor configured to conduct wireless communications according to a first radio access technology (RAT) in a first frequency band and in a second frequency band, wherein the first RAT is a cellular RAT, the first frequency band is in an unlicensed spectrum, and the second frequency band is in a licensed spectrum. In some embodiments, the apparatus includes a wireless local area network (WLAN) processor configured to conduct wireless communications according to a second RAT in the first frequency band. In some embodiments, the cellular processor and the WLAN processor are configured to couple to a common antenna for communications in the first frequency band. In some embodiments, the cellular processor may notify the WLAN processor when it is scanning and/or when it is assigned secondary component carriers in the first frequency band. In some embodiments, the WLAN processor may notify the cellular processor when it is transmitting. In some embodiments, the WLAN processor and/or the cellular processor may perform one or more actions in response to such notifications to improve coexistence in the first frequency band.

公开(公告)号：US10999798B2

公开(公告)日：2021-05-04

申请号：US16013697

申请日：2018-06-20

Applicant: Apple Inc.

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

IPC: H04W52/02 ,  H04W84/12

Abstract: An interface circuit in an electronic device (such as an access point) may provide a wake-up beacon to a recipient electronic device. During operation, the interface circuit may provide a wake-up beacon associated with a predefined sub-channel in one or more channels in a band of frequencies, where the wake-up beacon is for a wake-up radio in the recipient electronic device. Moreover, the wake-up beacon may be provided within an associated time interval, such as a keep-alive interval of the electronic device. In some embodiments, the wake-up beacon includes a field with channel information that specifies one or more second channels used by a main radio in the recipient electronic device. Alternatively or additionally, the wake-up beacon may include a field with service information that specifies one or more types of services and/or a field with information specifying a transmit power of the interface circuit.

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：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.

公开(公告)号：US20170303127A1

公开(公告)日：2017-10-19

申请号：US15468016

申请日：2017-03-23

Applicant: Apple Inc.

Inventor： Alejandro J. Marquez ,  Tushar R. Shah ,  Mohit Narang ,  Indranil S. Sen ,  Shang-Te Yang

IPC: H04W12/08 ,  H04L29/06 ,  H04W4/02 ,  H04L29/08

CPC classification number: H04W12/08 ,  H04L69/22 ,  H04L69/323 ,  H04W4/023

Abstract: A wireless network may include devices that wirelessly transmit and receive packets. Each packet may include a preamble, a start-of-frame delimiter, a physical layer header, a sequence of symbols between the start-of-frame delimiter and the physical layer header, and a data payload. The sequence of symbols may have a pattern that is resistant to spoofing attacks. A receiving device may have a correlator that correlates known symbols against the symbols in the sequence using overlapping three-symbol-length correlation windows. Early arrival peaks in the output of the correlator may be used to correct time stamp information in the packets and late arrival peaks corresponding to spoofed signals from an attacker may be ignored. Time stamp information may be processed to determine ranges between transmitting and receiving devices.