Patents by Inventor Siegfried LEHMANN

Siegfried LEHMANN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12356315
    Abstract: Systems and methods for low power wireless device detection are provided. In one or more implementations, a transmitting/advertising device may include a device identifier and/or one or more time-offset bits in a wireless communication frame for a scanning/receiving device. The scanning/receiving device may perform sequence-level correlation operations to detect the presence of the transmitting/advertising device. The sequence-level correlation operations may detect the transmitting/advertising device based on a detection of a correlation signal peak corresponding to the device identifier, and/or based relative timing of the correlation signal peak corresponding to the device identifier and a correlation signal peak corresponding to another item in the wireless communication frame.
    Type: Grant
    Filed: August 25, 2023
    Date of Patent: July 8, 2025
    Assignee: Apple Inc.
    Inventors: Lei Li, Camille Chen, Siegfried Lehmann, Yuelin Ma
  • Patent number: 12207332
    Abstract: Methods performed by a first sink device, a source device, or a second sink device. The first sink device is connected to a source device via a first communication link and a second sink device via a second communication link, wherein the second sink device is configured to eavesdrop on communications between the first sink device and the source device on the first communication link. The methods include determining an occurrence of a trigger event and modifying an operation of at least one of the first sink device, the second sink device or the source device based at least on the trigger event occurring.
    Type: Grant
    Filed: August 22, 2023
    Date of Patent: January 21, 2025
    Assignee: Apple Inc.
    Inventors: Lei Li, Xiaojun Chen, Camille Chen, Siegfried Lehmann, Vusthla Sunil Reddy, Peter M Agboh
  • Publication number: 20240244683
    Abstract: This disclosure relates to techniques for access control operation between devices in a wireless communication system. An access device may store reader group identifier information for one or more reader devices. The access device may receive an advertisement indication from a reader device in a wireless manner. The advertisement indication may include a reader group identifier for the reader device. The access device may determine that the reader group identifier information stored by the access device includes the reader group identifier indicated by the reader device. The access device may attempt to perform access control communication exchange with the reader device based at least in part on determining that the reader group identifier information stored by the access device includes the reader group identifier indicated by the reader device.
    Type: Application
    Filed: December 12, 2023
    Publication date: July 18, 2024
    Inventors: Lochan Verma, Martijn T. Haring, Florian Galdo, Su Khiong Yong, Siegfried Lehmann, Yann Ly-Gagnon
  • Publication number: 20240107426
    Abstract: Systems and methods for low power wireless device detection are provided. In one or more implementations, a transmitting/advertising device may include a device identifier and/or one or more time-offset bits in a wireless communication frame for a scanning/receiving device. The scanning/receiving device may perform sequence-level correlation operations to detect the presence of the transmitting/advertising device. The sequence-level correlation operations may detect the transmitting/advertising device based on a detection of a correlation signal peak corresponding to the device identifier, and/or based relative timing of the correlation signal peak corresponding to the device identifier and a correlation signal peak corresponding to another item in the wireless communication frame.
    Type: Application
    Filed: August 25, 2023
    Publication date: March 28, 2024
    Inventors: Lei LI, Camille CHEN, Siegfried LEHMANN, Yuelin MA
  • Publication number: 20240106689
    Abstract: Systems and methods for low power wireless device detection are provided. In one or more implementations, a transmitting/advertising device may include a device identifier and/or one or more time-offset bits in a wireless communication frame for a scanning/receiving device. The scanning/receiving device may perform sequence-level correlation operations to detect the presence of the transmitting/advertising device. The sequence-level correlation operations may detect the transmitting/advertising device based on a detection of a correlation signal peak corresponding to the device identifier, and/or based relative timing of the correlation signal peak corresponding to the device identifier and a correlation signal peak corresponding to another item in the wireless communication frame.
    Type: Application
    Filed: August 25, 2023
    Publication date: March 28, 2024
    Inventors: Lei LI, Camille CHEN, Siegfried LEHMANN, Yuelin MA
  • Publication number: 20230397280
    Abstract: Methods performed by a first sink device, a source device, or a second sink device. The first sink device is connected to a source device via a first communication link and a second sink device via a second communication link, wherein the second sink device is configured to eavesdrop on communications between the first sink device and the source device on the first communication link. The methods include determining an occurrence of a trigger event and modifying an operation of at least one of the first sink device, the second sink device or the source device based at least on the trigger event occurring.
    Type: Application
    Filed: August 22, 2023
    Publication date: December 7, 2023
    Inventors: Lei LI, Xiaojun CHEN, Camille CHEN, Siegfried LEHMANN, Vusthla Sunil REDDY, Peter M. AGBOH
  • Patent number: 11743963
    Abstract: Methods performed by a first sink device, a source device, or a second sink device. The first sink device is connected to a source device via a first communication link and a second sink device via a second communication link, wherein the second sink device is configured to eavesdrop on communications between the first sink device and the source device on the first communication link. The methods include determining an occurrence of a trigger event and modifying an operation of at least one of the first sink device, the second sink device or the source device based at least on the trigger event occurring.
    Type: Grant
    Filed: February 28, 2022
    Date of Patent: August 29, 2023
    Assignee: Apple Inc.
    Inventors: Lei Li, Xiaojun Chen, Camille Chen, Siegfried Lehmann, Vusthla Sunil Reddy, Peter M. Agboh
  • Publication number: 20220183097
    Abstract: Methods performed by a first sink device, a source device, or a second sink device. The first sink device is connected to a source device via a first communication link and a second sink device via a second communication link, wherein the second sink device is configured to eavesdrop on communications between the first sink device and the source device on the first communication link. The methods include determining an occurrence of a trigger event and modifying an operation of at least one of the first sink device, the second sink device or the source device based at least on the trigger event occurring.
    Type: Application
    Filed: February 28, 2022
    Publication date: June 9, 2022
    Inventors: Lei LI, Xiaojun CHEN, Camille CHEN, Siegfried LEHMANN, Vusthla Sunil REDDY, Peter M. AGBOH
  • Patent number: 11297670
    Abstract: Methods performed by a first sink device, a source device, or a second sink device. The first sink device is connected to a source device via a first communication link and a second sink device via a second communication link, wherein the second sink device is configured to eavesdrop on communications between the first sink device and the source device on the first communication link. The methods include determining an occurrence of a trigger event and modifying an operation of at least one of the first sink device, the second sink device or the source device based at least on the trigger event occurring.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 5, 2022
    Assignee: Apple Inc.
    Inventors: Lei Li, Xiaojun Chen, Camille Chen, Siegfried Lehmann, Vusthla Sunil Reddy, Peter M. Agboh
  • Patent number: 11160017
    Abstract: A dual-radio AP including both a high-power (e.g., Wi-Fi) radio and a low-power (e.g., BLE) radio may support an assisted wakeup service for a power-limited dual-radio mobile device (STA). The power-limited STA may register with the AP for the assisted wakeup service, and may then disable its Wi-Fi radio (or otherwise initiate a lower-power mode). The power-limited STA may receive a BLE communication indicating the AP has pending Wi-Fi transmissions or updates applicable to the power-limited STA. In response, the power-limited STA may turn on its Wi-Fi radio and receive the pending transmissions or updates from the AP. If an AP does not include a low-power radio, then a high-power/low-power dual-radio STA that is not power-limited may serve as an assisted wakeup service proxy. The proxy may scan and trace the Wi-Fi beacons from the AP, and generate the BLE communication to the power-limited STA on behalf of the AP.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: October 26, 2021
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Siegfried Lehmann, Su Khiong Yong, Guoqing Li
  • Patent number: 10775442
    Abstract: A device and method for determining the storage capacity of an electrical energy store, as for example a rechargeable battery, based on the phase of the complex impedance of the electrical energy store. The impedance of the electrical energy store is determined in that the energy store is loaded with a specified periodic load and the system response setting in as a result is ascertained. On the basis of the correlation between the phase of the complex impedance of the electrical energy store and the storage capacity of the electrical energy store, it is thereupon possible reliably and in a simple manner to ascertain the storage capacity of the electrical energy store.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: September 15, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Christian Schlasza, Siegfried Lehmann
  • Publication number: 20200107387
    Abstract: Methods performed by a first sink device, a source device, or a second sink device. The first sink device is connected to a source device via a first communication link and a second sink device via a second communication link, wherein the second sink device is configured to eavesdrop on communications between the first sink device and the source device on the first communication link. The methods include determining an occurrence of a trigger event and modifying an operation of at least one of the first sink device, the second sink device or the source device based at least on the trigger event occurring.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 2, 2020
    Inventors: Lei LI, Xiaojun Chen, Camille Chen, Siegfried Lehmann, Vusthla Sunil Reddy, Peter M. Agboh
  • Patent number: 10609543
    Abstract: In some embodiments, one or more wireless stations operate to configure direct communication with neighboring wireless stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. Embodiments of the disclosure relate to a mechanism for a device to transmit, via a BTLE (or Bluetooth) interface, a first message indicating an operation associated with a Wi-Fi service (e.g., a service available via a Wi-Fi interface and/or Wi-Fi related interface parameters) to a peer device. The first message may include a service hash that indicates the operation. The service hash may be included in a first data structure. The first data structure may indicate availability of the Wi-Fi service. The device may receive a second message from the peer device indicating that the neighboring wireless station intends to subscribe to or provide the Wi-Fi service, e.g., via Wi-Fi peer-to-peer communications.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: March 31, 2020
    Assignee: Apple Inc.
    Inventors: Su Khiong Yong, Christiaan A. Hartman, Anjali S. Sandesara, Lawrie Kurian, Peter N. Heerboth, Guoqing Li, Siegfried Lehmann, Akshay Mangalam Srivatsa, Yong Liu, Michael Jason Giles
  • Publication number: 20200059858
    Abstract: A dual-radio AP including both a high-power (e.g., Wi-Fi) radio and a low-power (e.g., BLE) radio may support an assisted wakeup service for a power-limited dual-radio mobile device (STA). The power-limited STA may register with the AP for the assisted wakeup service, and may then disable its Wi-Fi radio (or otherwise initiate a lower-power mode). The power-limited STA may receive a BLE communication indicating the AP has pending Wi-Fi transmissions or updates applicable to the power-limited STA. In response, the power-limited STA may turn on its Wi-Fi radio and receive the pending transmissions or updates from the AP. If an AP does not include a low-power radio, then a high-power/low-power dual-radio STA that is not power-limited may serve as an assisted wakeup service proxy. The proxy may scan and trace the Wi-Fi beacons from the AP, and generate the BLE communication to the power-limited STA on behalf of the AP.
    Type: Application
    Filed: October 24, 2019
    Publication date: February 20, 2020
    Inventors: Yong Liu, Christiaan A. Hartman, Siegfried Lehmann, Su Khiong Yong, Guoqing Li
  • Patent number: 10484941
    Abstract: A dual-radio AP including both a high-power (e.g., Wi-Fi) radio and a low-power (e.g., BLE) radio may support an assisted wakeup service for a power-limited dual-radio mobile device (STA). The power-limited STA may register with the AP for the assisted wakeup service, and may then disable its Wi-Fi radio (or otherwise initiate a lower-power mode). The power-limited STA may receive a BLE communication indicating the AP has pending Wi-Fi transmissions or updates applicable to the power-limited STA. In response, the power-limited STA may turn on its Wi-Fi radio and receive the pending transmissions or updates from the AP. If an AP does not include a low-power radio, then a high-power/low-power dual-radio STA that is not power-limited may serve as an assisted wakeup service proxy. The proxy may scan and trace the Wi-Fi beacons from the AP, and generate the BLE communication to the power-limited STA on behalf of the AP.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: November 19, 2019
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Siegfried Lehmann, Su Khiong Yong, Guoqing Li
  • Patent number: 10397197
    Abstract: Methods and apparatuses for mitigating coexistence interference in a wireless device between a WLAN interface and a WPAN interface during a WLAN authentication process. The wireless device associates with a WLAN access point (AP), and after receiving a WLAN association response from the WLAN AP, the wireless device alternates between WLAN time periods, during which WLAN transmission is enabled and WPAN transmission is disabled, and WPAN time periods, during which WPAN transmission is enabled and WLAN transmission is disabled, during the WLAN authentication process. Durations of the WPAN time periods are based at least in part on a WPAN profile, e.g., a Bluetooth profile, in use by the wireless device. Durations of the WLAN time periods are based at least in part on receipt of WLAN authentication messages from the WLAN AP during the authentication process or expiration of WLAN authentication process timers.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: August 27, 2019
    Assignee: Apple Inc.
    Inventors: Ye Sun, Camille Chen, Guangquan Zhou, Hsin-Yao Chen, Siegfried Lehmann
  • Patent number: 10375035
    Abstract: Methods and apparatuses for managing coexistence of multiple wireless devices that share a radio frequency band and communicate with a wireless network device. The wireless devices include both wireless personal area network (WPAN) and wireless local area network (WLAN) devices. The wireless network device monitors data activity for WPAN devices to determine whether the WPAN devices are active or inactive, and sets one or more polling intervals for the WPAN devices accordingly. The wireless network device consolidates polling for multiple WPAN devices into a common WPAN polling time period and sends a radio frequency (RF) reservation request to a WLAN access point (AP), the RF reservation request including an indication of a duration for the common WPAN polling time period, during which the multiple WPAN devices are polled. WLAN data packet transmission is delayed during the common WPAN polling time period to mitigate coexistence interference.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: August 6, 2019
    Assignee: Apple Inc.
    Inventors: Camille Chen, Ye Sun, Hsin-Yao Chen, Siegfried Lehmann
  • Publication number: 20190154764
    Abstract: A device and method for determining the storage capacity of an electrical energy store, as for example a rechargeable battery, based on the phase of the complex impedance of the electrical energy store. The impedance of the electrical energy store is determined in that the energy store is loaded with a specified periodic load and the system response setting in as a result is ascertained. On the basis of the correlation between the phase of the complex impedance of the electrical energy store and the storage capacity of the electrical energy store, it is thereupon possible reliably and in a simple manner to ascertain the storage capacity of the electrical energy store.
    Type: Application
    Filed: March 17, 2017
    Publication date: May 23, 2019
    Inventors: Christian Schlasza, Siegfried Lehmann
  • Patent number: 10237193
    Abstract: In embodiments, a client station operates to identify and prioritize time-sensitive short-range wireless packets, such as time-sensitive Bluetooth Low Energy (BTLE) packets, in a congested wireless environment. The client station may identify time-sensitive packets using, e.g., the type of device providing the packets, a state of the device providing the packets, and/or the type of data included in the packets. The client station may prioritize the time-sensitive packets in various ways, including by providing priority scheduling to the time-sensitive packets; pausing communication of other types of Bluetooth packets, such as A2DP packets; reducing a data rate of other types of Bluetooth packets, such as A2DP packets; and/or extending a data packet size of time-sensitive BTLE packets. The time-sensitive packets may thus be prioritized over packets associated with the same wireless protocol and/or a different wireless protocol.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: March 19, 2019
    Assignee: Apple Inc.
    Inventors: Camille Chen, Siegfried Lehmann, Hsin-Yao Chen, Wenping Lou
  • Patent number: 10200843
    Abstract: In the subject system for Bluetooth audio role-based scheduling, an electronic device (e.g., a mobile phone), may receive streaming audio over a cellular connection, e.g. LTE, and may stream the audio to a head unit of a vehicle, e.g. via Bluetooth. The electronic device may also concurrently communicate with other electronic devices via, e.g., Wi-Fi, Bluetooth, and/or BTLE. The electronic device may determine the Bluetooth/communication capabilities of the HU device, such as buffer size, and the electronic device may proactively configure Bluetooth settings/parameters for communicating with the HU device based on the capabilities of the HU device. The electronic device may also adaptively modify scheduling for communications with other electronic devices based on the determined capabilities of the HU device.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: February 5, 2019
    Assignee: Apple Inc.
    Inventors: Camille Chen, Siegfried Lehmann, Hsin-Yao Chen, Wen Zhao