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: 11917540
    Abstract: Some embodiments of this disclosure include apparatuses and methods for implementing a target wake time (TWT) technique for multicast communication. For example, some embodiments relate to a method including configuring a target wake time (TWT) process for delivering one or more multicast packets to a group of electronic devices. The method further includes determining that a service period associated with the TWT process has started and transmitting, in accordance with the TWT process, the one or more multicast packets during the service period, where the one or more transmitted multicast packets are addressed to the group of electronic devices.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: February 27, 2024
    Assignee: Apple Inc.
    Inventors: Jarkko L. Kneckt, Christiaan A. Hartman, Qi Wang, Su Khiong Yong, Yong Liu
  • Patent number: 11895589
    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: May 11, 2022
    Date of Patent: February 6, 2024
    Assignee: Apple Inc.
    Inventors: Christiaan A. Hartman, Guoqing Li, Yong Liu, Su Khiong Yong, Jarkko L. Kneckt
  • Patent number: 11877348
    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: January 7, 2022
    Date of Patent: January 16, 2024
    Assignee: Apple Inc.
    Inventors: Chiu Ngok E. Wong, Christiaan A. Hartman, Zheng Zeng, Joonsuk Kim, Su Khiong Yong, Yong Liu
  • Publication number: 20230362628
    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: Application
    Filed: May 2, 2023
    Publication date: November 9, 2023
    Applicant: Apple Inc.
    Inventors: Guoqing LI, Christiaan A. HARTMAN, Yong LIU, Jarkko L. KNECKT
  • Patent number: 11770676
    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: Grant
    Filed: March 18, 2021
    Date of Patent: September 26, 2023
    Assignee: Apple Inc.
    Inventors: Srinivas Burugupalli, Qi Wang, Oren Shani, Christiaan A. Hartman, Danlin Li, Aniruddha S. Diwan
  • Patent number: 11765577
    Abstract: Disclosed herein are system, method, and computer program product embodiments for identity obscuration of a station (STA) connected to a wireless network to prevent the tracking of the STA. Embodiments include a STA configured to establish a security association with an access point (AP) based on an original long term identity for the station and an identity of the AP. The STA can transmit a new long term identity for the STA to the AP based on the security association. The STA can then transmit a request frame to change the original short term identity assigned to the STA to the AP. The STA can receive a response frame from the AP. The response frame can include a new short term identity assigned to the station by the AP. The STA can then map its new long term identity to its new short term identity assigned by the AP.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: September 19, 2023
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Tianyu Wu, Qi Wang, Jarkko L. Kneckt, Jinjing Jiang, Su Khiong Yong, Guoqing Li
  • 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