Patents by Inventor Christiaan A. Hartman

Christiaan A. Hartman 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: 11683678
    Abstract: Some embodiments of this disclosure include apparatuses and methods for implementing discovery frames and group addressed frames communication. For example, some embodiments relate to a method including generating a first frame to be transmitted to a first electronic device. An association identifier (AID) value of the first frame is set to a first value to indicate that the first frame is an individually addressed frame addressed to the first electronic device. The method further includes generating a second frame to be transmitted to a group of one or more electronic devices. An AID value of the second frame is set to a second value different from the first value. The method also includes transmitting the first frame and the second frame.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: June 20, 2023
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Christiaan A. Hartman, Yong Liu, Jarkko L. Kneckt
  • Patent number: 11671259
    Abstract: An apparatus comprises a memory and at least one processor in communication with the memory. The at least one processor is to detect, during a discovery window, a neighboring client station that is to perform peer-to-peer Wi-Fi communication via a Neighbor Awareness Networking (NAN) protocol and establish, via a negotiation after the discovery window, a datapath with the neighboring client station, wherein the negotiation includes an exchange of NAN data path setup attributes in parallel with an exchange of encryption cipher attributes and the encryption cipher is based on a simultaneous authentication of equals (SAE) protocol. The SAE protocol can be used to generate key material to encrypt the datapath.
    Type: Grant
    Filed: April 4, 2022
    Date of Patent: June 6, 2023
    Assignee: Apple Inc.
    Inventors: Yong Liu, Tashbeeb Haque, Christiaan A. Hartman, Lawrie Kurian
  • Patent number: 11564169
    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.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: January 24, 2023
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Oren Shani, Yong Liu, Xiaowen Wang, Yoel Boger, Christiaan A. Hartman, Christian W. Mucke, Tushar R. Shah, Matthew L. Semersky, Josef Peery
  • Publication number: 20220272635
    Abstract: An interface circuit in an electronic device (such as an access point) may receive a setup request associated with the recipient electronic device. The setup request may specify a group address for which the recipient electronic device wants to receive associated frames and a proposed transmission interval. Based at least in part on the proposed transmission interval, the electronic device may determine a transmission schedule and/or may assign, based at least in part on the group address, the recipient electronic device to an aggregated group having a flexible multicast service identifier (FMSID). Then, the electronic device may provide a wake-up frame for the recipient electronic device, where the wake-up frame includes an identifier of the aggregated group for which a group-addressed frame will subsequently be transmitted by the electronic device. Moreover, the wake-up frame may be provided at a transmission time based at least in part on the transmission schedule.
    Type: Application
    Filed: May 11, 2022
    Publication date: August 25, 2022
    Inventors: Christiaan A. Hartman, Guoqing Li, Yong Liu, Su Khiong Yong, Jarkko L. Kneckt
  • Patent number: 11418999
    Abstract: A wireless local area network (WLAN) station (STA) reports, with a medium access control (MAC) frame, a buffer status of an urgent traffic identifier (TID) to a second STA. In some embodiments, the second STA is also an access point (AP). The delay in reporting is reduced by providing a buffer status report for the urgent TID in a data frame being transmitted to carry data for a current TID. The buffer status report, in some embodiments, provides the value of the urgent TID. In some embodiments, the buffer status report provides an indication of the amount of data in a buffer corresponding to the urgent TID. In some embodiments, the buffer status report is based on an aggregated measure of more than one buffer with data awaiting transmission. The transmission of the MAC frame, in some embodiments, is unsolicited.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: August 16, 2022
    Inventors: Guoqing Li, Christiaan A. Hartman, Oren Shani, Matthew L. Semersky, Joonsuk Kim, Jarkko Kneckt, Ashok Ranganath, Yong Liu, Su Khiong Yong
  • Publication number: 20220231852
    Abstract: An apparatus comprises a memory and at least one processor in communication with the memory. The at least one processor is to detect, during a discovery window, a neighboring client station that is to perform peer-to-peer Wi-Fi communication via a Neighbor Awareness Networking (NAN) protocol and establish, via a negotiation after the discovery window, a datapath with the neighboring client station, wherein the negotiation includes an exchange of NAN data path setup attributes in parallel with an exchange of encryption cipher attributes and the encryption cipher is based on a simultaneous authentication of equals (SAE) protocol. The SAE protocol can be used to generate key material to encrypt the datapath.
    Type: Application
    Filed: April 4, 2022
    Publication date: July 21, 2022
    Applicant: Apple Inc.
    Inventors: Yong Liu, Tashbeeb Haque, Christiaan A. Hartman, Lawrie Kurian
  • Patent number: 11375453
    Abstract: An interface circuit in an electronic device (such as an access point) may receive a setup request associated with the recipient electronic device. The setup request may specify a group address for which the recipient electronic device wants to receive associated frames and a proposed transmission interval. Based at least in part on the proposed transmission interval, the electronic device may determine a transmission schedule and/or may assign, based at least in part on the group address, the recipient electronic device to an aggregated group having a flexible multicast service identifier (FMSID). Then, the electronic device may provide a wake-up frame for the recipient electronic device, where the wake-up frame includes an identifier of the aggregated group for which a group-addressed frame will subsequently be transmitted by the electronic device. Moreover, the wake-up frame may be provided at a transmission time based at least in part on the transmission schedule.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: June 28, 2022
    Assignee: Apple Inc.
    Inventors: Christiaan A. Hartman, Guoqing Li, Yong Liu, Su Khiong Yong, Jarkko L. Kneckt
  • Publication number: 20220191786
    Abstract: This disclosure relates to methods for conducting multilink communications between a user equipment device (UE) and a wireless access point (AP) over a wireless local area network (WLAN). The UE establishes a connection with an access point through a WLAN, wherein the connection utilizes a plurality of links. The UE transmits an indication to the access point through a first link of the plurality of links, where the indication specifies one or more available links of the plurality of links that are available for the UE to receive downlink (DL) communications from the access point. The UE receives one or more DL communications from the access point through at least one of the one or more available links.
    Type: Application
    Filed: March 1, 2022
    Publication date: June 16, 2022
    Inventors: Jarkko L. Kneckt, Christiaan A. Hartman, Guoqing Li, Jinjing Jiang, Qi Wang, Su Khiong Yong, Tianyu Wu, Yong Liu
  • Publication number: 20220132301
    Abstract: Embodiments described herein relate to a system and method for providing flexible receiver configuration in wireless communication systems, such as 802.11 WLAN systems. In one embodiment, a wireless device may transmit a first data frame including first configuration information specifying a first configuration of the receiver to notify a remote device that the wireless device intends to configure its receiver according to the first configuration. After receiving an acknowledgement frame confirming the first configuration information, the wireless device may configure the receiver according to the first configuration. In another embodiment, a wireless device may receive a first data frame including first configuration information and further including a request that the wireless device configure its receiver according to the first configuration. In response, the wireless device may configure the receiver according to the first configuration.
    Type: Application
    Filed: January 7, 2022
    Publication date: April 28, 2022
    Inventors: Chiu Ngok E. Wong, Christiaan A. Hartman, Zheng Zeng, Joonsuk Kim, Su Khiong Yong, Yong Liu
  • Patent number: 11317405
    Abstract: One or more wireless stations may operate to configure Neighbor Awareness Networking (NAN)—direct communication with neighboring wireless stations, e.g., without utilizing an intermediate access point. Scheduling of NAN ranging procedures may include a first wireless station sending first information, including first scheduling preferences and a first ranging role, to a second wireless station. The first wireless station receives second information, including second scheduling preferences and a second ranging role, from the second wireless station. The first wireless station may initiate the ranging procedure based on the scheduling preferences and ranging parameters. Alternatively, the second wireless station and may initiate the ranging procedure based on the scheduling preferences and ranging parameters.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: April 26, 2022
    Assignee: Apple Inc.
    Inventors: Su Khiong Yong, Christiaan A. Hartman, Yong Liu, Lawrie Kurian, Peter N. Heerboth, Guoqing Li, Daniel R. Borges, Chiu Ngok E. Wong, Saravanan Balasubramaniyan, Tashbeeb Haque, Anand Rajagopalan
  • Patent number: 11304133
    Abstract: This disclosure relates to methods for conducting multilink communications between a user equipment device (UE) and a wireless access point (AP) over a wireless local area network (WLAN). The UE establishes a connection with an access point through a WLAN, wherein the connection utilizes a plurality of links. The UE transmits an indication to the access point through a first link of the plurality of links, where the indication specifies one or more available links of the plurality of links that are available for the UE to receive downlink (DL) communications from the access point. The UE receives one or more DL communications from the access point through at least one of the one or more available links.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: April 12, 2022
    Assignee: Apple Inc.
    Inventors: Jarkko L. Kneckt, Christiaan A. Hartman, Guoqing Li, Jinjing Jiang, Qi Wang, Su Khiong Yong, Tianyu Wu, Yong Liu
  • Patent number: 11296883
    Abstract: An apparatus comprises a memory and at least one processor in communication with the memory. The at least one processor is to detect, during a discovery window, a neighboring client station that is to perform peer-to-peer Wi-Fi communication via a Neighbor Awareness Networking (NAN) protocol and establish, via a negotiation after the discovery window, a datapath with the neighboring client station, wherein the negotiation includes an exchange of NAN data path setup attributes in parallel with an exchange of encryption cipher attributes and the encryption cipher is based on a simultaneous authentication of equals (SAE) protocol. The SAE protocol can be used to generate key material to encrypt the datapath.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 5, 2022
    Assignee: Apple Inc.
    Inventors: Yong Liu, Tashbeeb Haque, Christiaan A. Hartman, Lawrie Kurian
  • Patent number: 11265385
    Abstract: This disclosure relates to service discovery using a dynamically configurable Bloom filter. According to some embodiments, various parameters of the Bloom filter may be determined by a first wireless device. The parameters may include a number of services advertised using the Bloom filter, a false positive rate of the Bloom filter, a set of hash functions used with the Bloom filter, and/or a size of the Bloom filter. The Bloom filter may be generated according to the determined parameters. The Bloom filter, along with some or all of the parameters of the Bloom filter, may be transmitted by the first wireless device. A second wireless device may use the Bloom filter as part of a service discovery process to determine whether or not a desired service is available via the first wireless device.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: March 1, 2022
    Assignee: Apple Inc.
    Inventors: Su Khiong Yong, Christiaan A. Hartman, Kristen A. McIntyre, Yong Liu, Chiu Ngok E. Wong
  • Patent number: 11252555
    Abstract: Embodiments described herein relate to a system and method for providing flexible receiver configuration in wireless communication systems, such as 802.11 WLAN systems. In one embodiment, a wireless device may transmit a first data frame including first configuration information specifying a first configuration of the receiver to notify a remote device that the wireless device intends to configure its receiver according to the first configuration. After receiving an acknowledgement frame confirming the first configuration information, the wireless device may configure the receiver according to the first configuration. In another embodiment, a wireless device may receive a first data frame including first configuration information and further including a request that the wireless device configure its receiver according to the first configuration. In response, the wireless device may configure the receiver according to the first configuration.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: February 15, 2022
    Assignee: Apple Inc.
    Inventors: Chiu Ngok E. Wong, Christiaan A. Hartman, Zheng Zeng, Joonsuk Kim, Su Khiong Yong, Yong Liu
  • Patent number: 11212806
    Abstract: 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. A wireless station may determine a further availability window schedule for a first time period, including specifying availability for particular channels at particular time slots at a first time slot increment. The wireless station may specify availability at a second time slot increment for a subset of the time slots specified at the first time slot increment. The second time slot increment may be less than the first slot time increment. The wireless station may negotiate, with a neighboring wireless station, a peer-to-peer communication schedule for the peer-to-peer communication application based on the further availability window schedule, including specifying a portion of the peer-to-peer schedule using the second time slot increment.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: December 28, 2021
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Lawrie Kurian, Tashbeeb Haque
  • Patent number: 11184890
    Abstract: An interface circuit in an electronic device may contend for access to a shared communication channel on behalf of the electronic device and a recipient electronic device, where the access has a duration. Then, the electronic device may provide a schedule frame intended for the recipient electronic device that includes information that specifies one or more time slots during the duration that are associated with the recipient electronic device and one or more communication functions of the recipient electronic device in the one or more time slots. Moreover, the electronic device may provide a data frame with data intended for the recipient electronic device. In response, the electronic device may receive a response frame associated with the recipient electronic device, where the response frame is received during at least one of the one or more time slots.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: November 23, 2021
    Assignee: Apple Inc.
    Inventors: Daniel R. Borges, Oren Shani, Christiaan A. Hartman, Yong Liu, Charles F. Dominguez, Karthik R. Mekala, Tashbeeb Haque, Lawrie Kurian, Mete Fikirlier, Guoqing Li, Rajneesh Kumar, Ka Ho P. Poon, Brian B. Whitaker, Joseph Hakim, John A. Wilson, Tony Chi Wang Ng, Roopkumar Parthasarathy Rao, Curtis J. Schmidek, Shishir Gupta, Tushar R. Shah, Jacob H. Power, Bryan J. Follis, Anand Rajagopalan
  • 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: 11109216
    Abstract: 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. A wireless station may be configured to perform a method to accelerate discovery of a peer device after an out-of-band triggering event. For example, a wireless device may detect an out-of-band triggering event and activate a wireless interface capable of peer-to-peer communications in response. The wireless device may transmit one or more discovery messages (e.g., discovery beacons, active subscribe messages, and/or unsolicited publish messages) over the wireless interface immediately after activation of the wireless interface to aid in discovery of the peer device. The one or more discovery messages may be transmitted as service discovery frames. The wireless device may perform service discovery over the wireless interface with the peer device post discovery.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: August 31, 2021
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Lawrie Kurian, Tashbeeb Haque
  • Publication number: 20210211836
    Abstract: This disclosure relates to techniques for performing ranging wireless communication including prioritization. A first wireless device may transmit a request for ranging services to a second wireless device. The first wireless device may transmit an indication of a ranging priority to the second wireless device. The second wireless device may determine a granted ranging priority. The first and second wireless device may perform ranging communication according to the granted ranging priority.
    Type: Application
    Filed: March 18, 2021
    Publication date: July 8, 2021
    Inventors: Srinivas Burugupalli, Qi Wang, Oren Shani, Christiaan A. Hartman, Danlin Li, Aniruddha S. Diwan
  • Patent number: 11057829
    Abstract: Methods for performing a ranging procedure according to the non-trigger-based protocol may include negotiating timing parameters associated with the ranging procedure, performing a ranging measurement, and transmitting/receiving, after completion of the ranging measurement, a message announcing initiation of another ranging measurement. The timing parameters may indicate a time window in which an initiating device can initiate a subsequent ranging measurement and the message announcing initiation of the second ranging measurement may be received during the time range specified. Timing parameters may indicate a responding device's required minimum and maximum time between ranging measurements. Additional parameters may indicate an initiating device's required minimum and maximum time between ranging measurements. A power savings mode may be entered after the first ranging measurement and during at least a portion of a time period specified by the parameters.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: July 6, 2021
    Assignee: Apple Inc.
    Inventors: Qi Wang, Christiaan A. Hartman, Oren Shani, Rafi Vitory, Roy Beeri, Yoav Feinmesser