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).

  • Publication number: 20210014784
    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: April 16, 2020
    Publication date: January 14, 2021
    Inventors: Jarkko L. Kneckt, Christiaan A. Hartman, Guoqing Li, Jinjing Jiang, Qi Wang, Su Khiong Yong, Tianyu Wu, Yong Liu
  • Patent number: 10893083
    Abstract: In some embodiments, one or more wireless stations operate according to Neighbor Awareness Networking (NAN)—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 NAN datapath scheduling and NAN pre-datapath operation setup and scheduling. 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, as well as pre-datapath operation triggering and scheduling. Scheduling attributes may include a native scheduler rank and a NAN data cluster scheduler rank. NAN data cluster base schedules may be scheduled as equal-sets or subsets of datapath schedules. The datapath model may be implemented for unicast and multicast communication between wireless stations, including mobile stations.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: January 12, 2021
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Daniel R. Borges, Peter N. Heerboth, Lawrie Kurian, Su Khiong Yong, Anand Rajagopalan, Saravanan Balasubramaniyan, Tashbeeb Haque, Andreas Wolf, Guoqing Li, Lilach Zukerman, Oren Shani
  • Patent number: 10893482
    Abstract: Wireless stations may operate to configure direct communication with neighboring wireless stations (direct communication between wireless stations without an intermediate access point). Mechanisms for near-field device-to-device communications are disclosed. A wireless station may be configured to determine a minimum power level for a near-field device-to-device datapath. The wireless device may determine an average channel interference for a first discovery channel and compare the average channel interference to a first threshold. If the average channel interference is less than the first threshold, the wireless device may select a first transmission mode associated with a first power level and determine a maximum data rate for the first transmission mode.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: January 12, 2021
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Jarkko L. Kneckt, Su Khiong Yong
  • Patent number: 10863546
    Abstract: Some embodiments enable improved aggregated throughput and average latency in a wireless communication channel. Wireless electronic devices may implement adaptive contention window (ACW) channel access that improves channel capacity and enables latency sensitive applications (e.g., video streaming), especially when all wireless electronic devices operating on the channel as well as those in proximity utilize ACW channel access. Some embodiments detect when wireless stations on the communication channel as well as wireless stations in proximity are utilizing ACW channel access to obtain a transmit opportunity (TXOP). Based on the detection, an access point (AP) can instruct an associated wireless station to: use ACW channel access to obtain a TXOP, use a different channel access method obtain a TXOP as needed, disassociate and associate with a different AP, or use a different channel access method to obtain a TXOP.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: December 8, 2020
    Assignee: Apple Inc.
    Inventors: Yoel Boger, Yaniv Dvory, Jarkko L. Kneckt, Guoqing Li, Christiaan A. Hartman
  • Patent number: 10856229
    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.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: December 1, 2020
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Yong Liu, Christiaan A. Hartman, Jarkko L. Kneckt, Oren Shani
  • Patent number: 10849168
    Abstract: Disclosed herein are method, system, and computer program product embodiments for utilizing multiple traffic identifiers (TIDs) in a single user (SU) transmission. Some embodiments may operate by forming a SU multiple TID data unit that includes first data associated with a first access category and a first TID and second data associated with a second access category and a second TID. Some embodiments may further operate by transmitting the SU multiple TID data unit during a transmission opportunity based on configuration parameters associated with the transmission opportunity.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: November 24, 2020
    Assignee: Apple Inc.
    Inventors: Jarkko L. Kneckt, Oren Shani, Christiaan A. Hartman, Joonsuk Kim, Guoqing Li, Yong Liu, Ashok Ranganath
  • Patent number: 10841924
    Abstract: A basic bandwidth wireless local area network (WLAN) device or station (STA) is assigned to a secondary channel. The basic bandwidth STA may be a 20 MHz STA. On the secondary channel, the basic bandwidth STA operates in a wideband mode recovering received data transmitted from an access point (AP) as part of a high bandwidth physical layer protocol data unit (PPDU). The STA and the AP can be members of a basic service set (BSS). The high bandwidth PPDU may be, for example, a 40 MHz, 60 MHz, or 80 MHz PPDU. Once on the secondary channel, the STA relies on the AP to perform channel sensing and scheduling activities, thus reducing power consumption at the STA and increasing the efficiency of the BSS. Several signaling formats are provided for indicating the secondary channel that the STA is assigned to or requests to move to.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: November 17, 2020
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Jarkko L. Kneckt, Christiaan A. Hartman, Yong Liu, Su Khiong Yong
  • Patent number: 10805056
    Abstract: A wireless local area network station (STA) changes a receiver operating mode (ROM) and saves power by influencing when a ROM-conforming access point (AP) transmission takes place. The STA evaluates candidate delay regimes after a negotiation exchange with the STA. The STA then instructs the AP of a selected delay regime which the AP is permitted to use when transmitting data according to the changed ROM. The ROM can involve a change in the system bandwidth demodulated by the STA and/or the number of spatial streams demodulated by the STA. The delay regime can allow the AP to transmit with little or no delay based on the changed ROM, or the delay regime may require a fixed time delay before the AP transmits according to the changed ROM.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: October 13, 2020
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Christiaan A. Hartman, Joonsuk Kim, Su Khiong Yong, Yong Liu
  • Patent number: 10785718
    Abstract: An access point establishes target wakeup times (TWTs) with one or more associated electronic devices in a WLAN. The access point transitions to a power-saving mode outside of the one or more TWTs. The access point maintains synchronization with the one or more electronic devices, during at least a first TWT in the one or more TWTs, by transmitting, to the one or more electronic devices, a TWT beacon that includes, or in conjunction with, synchronization information. Alternatively or additionally, during at least the first TWT, the access point transmits a multi-user trigger frame that includes the synchronization information to the one or more electronic devices. In response to the multi-user trigger frame, the access point receives data frames from the one or more electronic devices, transmits one or more acknowledgments, and transitions into the power-saving mode during a remainder of at least the first TWT.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: September 22, 2020
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Oren Shani, Yong Liu, Christiaan A. Hartman, Jarkko L. Kneckt, Joonsuk Kim, Su Khiong Yong
  • Patent number: 10757731
    Abstract: Some embodiments are directed to grouping electronic devices into contention groups to reduce uplink Orthogonal Frequency-Division Multiple Access (OFDMA) random access (OFDMA-RA) collisions. An access point may explicitly assign an electronic device to a contention group, or the electronic device may implicitly determine an assignment to the contention group. To explicitly assign a device to a contention group, the access point may randomly assign or assign based on a criteria of the electronic device. Examples of criteria include an association identifier (AID), a traffic type/quality of service (QoS) category, a power saving preference, and an association status. The electronic device may implicitly determine a contention group assignment based on the total number of contention groups. The electronic device may use the explicitly or implicitly assigned contention group number to determine whether the electronic device may contend for a given trigger frame random access (TF-R) frame.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: August 25, 2020
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Joonsuk Kim, Christiaan A. Hartman, Syed Aon Mujtaba, Chiu Ngok E. Wong, Yong Liu, Su Khiong Yong
  • Publication number: 20200267630
    Abstract: Passive and active scanning for extended range wireless networking. The choice between legacy and extended range signaling can depend on one or more factors. For passive scanning, an electronic device may transmit a combination of legacy beacons and extended range beacons for network discovery by receiving electronic devices. For active scanning, an electronic device may transmit extended range probe requests in addition to legacy probe requests to discover all of the access points within its transmission range. Responses to probe requests can use extended range, legacy, single user, and/or multi user protocols.
    Type: Application
    Filed: February 24, 2020
    Publication date: August 20, 2020
    Applicant: Apple Inc.
    Inventors: Jarkko L. KNECKT, Christiaan A. HARTMAN, Guoqing Li, Joonsuk KIM, Matthew L. SEMERSKY, Oren SHANI, Syed A. MUJTABA, Yong LIU
  • Patent number: 10736022
    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 a mechanism for peer NAN devices to assist one another in receiving communications from an access point common to the peer NAN devices. In some embodiments, a wireless station may establish a communication link with a Wi-Fi access point and establish a peer-to-peer communication link with one or more neighboring wireless stations. In addition, the wireless station may receive transmissions intended for at least one neighboring wireless station of the one or more neighboring wireless stations from the Wi-Fi access point and relay the transmissions to the at least one wireless station on behalf of the Wi-Fi access point.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: August 4, 2020
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Guoqing Li, Su Khiong Yong
  • Publication number: 20200217875
    Abstract: Methods, systems, and apparatus are presented for performing network probing. A user equipment device (UE) may store a record associating traditional service set identifiers (SSIDs) with corresponding Short SSIDs. According to some embodiments, the UE may receive a message including a Short SSID, and determine whether a corresponding full SSID is known to the UE. Based on the determination, a probe request may be generated, addressed to either the Short SSID or the full SSID. After transmitting the probe request, the UE may receive a probe response, which may include a full SSID corresponding to the Short SSID. The UE may store a record associating the full SSID with the Short SSID, if applicable. According to some embodiments, a UE may receive a plurality of messages including respective SSIDs, and may generate a single probe request addressed to the SSIDs. The UE may receive a plurality of probe responses.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 9, 2020
    Inventors: Guoqing Li, Jarkko L. Kneckt, Yong Liu, Christiaan A. Hartman, Welly Kasten
  • Publication number: 20200221378
    Abstract: Methods and devices for implementing enhanced probe messaging over a wireless local area network. A user equipment (UE) may transmit a probe request message to a wireless access point (AP) through a wireless local area network (WLAN), wherein the probe request message requests one or more parameters of a response message. The UE may receive the response message as a probe response message or a beacon message from the first AP, and the response message may include information related to one or more basic service sets (BSSs). The information related to the one or more BSSs is determined at least in part based on the requested one or more parameters of the probe request message. The UE may establish a connection with a first BSS of the one or more BSSs based at least in part on the information comprised within the probe response message or the beacon message.
    Type: Application
    Filed: October 2, 2019
    Publication date: July 9, 2020
    Inventors: Jarkko L. Kneckt, Guoqing Li, Yong Liu, Christiaan A. Hartman
  • Publication number: 20200221292
    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: January 3, 2020
    Publication date: July 9, 2020
    Inventors: Guoqing LI, Christiaan A. HARTMAN, Yong LIU, Jarkko L. KNECKT
  • Publication number: 20200195438
    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: September 27, 2019
    Publication date: June 18, 2020
    Inventors: Yong Liu, Tashbeeb Haque, Christiaan A. Hartman, Lawrie Kurian
  • Publication number: 20200196299
    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: Application
    Filed: December 12, 2019
    Publication date: June 18, 2020
    Inventors: Yong Liu, Christiaan A. Hartman, Lawrie Kurian, Tashbeeb Haque
  • Patent number: 10681759
    Abstract: One or more wireless stations may operate to configure direct communication with neighboring mobile stations, e.g., direct communication between the wireless stations without utilizing an intermediate access point. A mechanism for a wireless station to transmit a paging beacon outside of a paging window may include establishing a paged data link with a peer station, determining that one or more data frames associated with the paged data link are pending transmission, and transmitting a beacon to the peer station outside of a scheduled paging window of the paged data link. The beacon may include a paging attribute indicating there are pending data frames.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: June 9, 2020
    Assignee: Apple Inc.
    Inventors: Yong Liu, Christiaan A. Hartman, Guoqing Li, Lawrie Kurian, Peter N. Heerboth, Su Khiong Yong
  • Publication number: 20200137518
    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: December 31, 2019
    Publication date: April 30, 2020
    Inventors: Srinivas Burugupalli, Qi Wang, Oren Shani, Christiaan A. Hartman, Danlin Li, Aniruddha S. Diwan
  • Patent number: 10638423
    Abstract: An interface circuit in an electronic device (such as an access point) may provide a group wake-up packet to a group of recipient electronic devices in a set of recipient electronic devices. During operation, the interface circuit may select the group in the set of recipient electronic devices, where the group includes at least one of the recipient electronic devices. Then, the interface circuit may provide the group wake-up packet for the recipient electronic devices in the group with information that specifies that a subset of the recipient electronic devices in the group transition from a low-power mode. For example, the information may include a bitmap that specifies the subset and an identifier of the group. Note that the electronic device may dynamically define the group. Alternatively, the recipient electronic devices in the group may be static.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: April 28, 2020
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Yong Liu, Oren Shani, Xiaowen Wang, Christiaan A. Hartman, Matthew L. Semersky, Josef Peery, Yoel Boger, Tushar R. Shah, Rajneesh Kumar, Christian W. Mucke