Patents by Inventor Liangxiao Xin

Liangxiao Xin 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: 11324045
    Abstract: A WiFi communications mechanism in which simultaneous transmission is negotiated and beamforming communications performed towards at least one station (STA), while nulling is performed towards one or more other access points (APs) to reduce interference. Omni-directional transmissions are utilized in a manner to overcome preamble interferences, which is used in combination with synchronizing symbol intervals to eliminate interference from symbol transitions. The enhanced simultaneous transmission protocol allows two APs to transmit simultaneously without interfering with one another.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: May 3, 2022
    Assignee: SONY GROUP CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud, Qing Xia, Kazuyuki Sakoda, Hiromasa Uchiyama, Yusuke Tanaka, Kosuke Aio, Ryuichi Hirata, Ken Tanaka, Thomas Handte, Dana Ciochina
  • Publication number: 20220086906
    Abstract: Multiple solutions for a non-STR (simultaneous transmit and receive) MLD (Multi-Link Device) contending and accessing the channel on a second link, during the detection time of the packet transmission on a first link. The solutions involve performing select backoff count-down procedures, channel accessing, and backoff initialization/re-initialization that the non-STR MLD should perform on the second link during its detection time on the first link.
    Type: Application
    Filed: April 16, 2021
    Publication date: March 17, 2022
    Applicant: SONY GROUP CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud
  • Patent number: 11259324
    Abstract: Systems, apparatus and methods for wireless local area network (WLAN) communication which support real-time application (RTA) packets. The access point (AP) schedules multiple-user (MU) multiple-input-multiple-output (MIMO) transmissions for uplink (UL) or downlink (DL) for RTA packets by allocating resources to packet transmissions before RTA packet arrival. The AP contends for channel access before the expected time of arrival of the RTA packet in the DL or UL direction. The operations reduce RTA packet latency on the WLAN.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: February 22, 2022
    Assignee: SONY GROUP CORPORATION
    Inventors: Mohamed Abouelseoud, Kazuyuki Sakoda, Liangxiao Xin
  • Publication number: 20220053560
    Abstract: A wireless communication apparatus, system or method for operation on a network utilizing CSMA/CA, in which non-AP stations can share their TXOP. After obtaining a TXOP, a non-AP station informs the AP to share the TXOP within its BSS. The AP collects buffer status and the QoS requirements of the buffer from the stations and arranges transmissions during the shared TXOP to satisfy the QoS requirement of the buffer reported by the STAs. The non-AP station can also share its TXOP through the AP using trigger frames or other mechanisms. The AP station may be part of a multi-link device and the AP can arrange transmissions on multiple links of an MLD.
    Type: Application
    Filed: April 12, 2021
    Publication date: February 17, 2022
    Inventors: Liangxiao Xin, Mohamed Abouelseoud
  • Publication number: 20220007417
    Abstract: A wireless communication protocol for an access point (AP) multi-link device (MLD) using carrier-sense multiple-access collision avoidance (CSMA/CA) with multi-link operations. Transmit opportunities (TXOPs) are obtained by setting a random number of backoff slots, as a random backoff, for channel contention on each link, and counting down the random backoff on each link independently. When the backoff for the link reaches zero, channel access is obtained and a TXOP duration of reserved on a link whose end time cannot occur later than the latest existing TXOPs of the AP MLD. Numerous variations are described for setting the random number of backoff slots and for reserving the TXOP duration on a link.
    Type: Application
    Filed: March 17, 2021
    Publication date: January 6, 2022
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud
  • Publication number: 20210410163
    Abstract: A wireless network communications protocol to allow sharing transmit opportunities (TXOP) in the same basic service set (BSS), or an overlapping basic service set (OBSS) over at least one channel. Sharing offer and request information is exchanged with an access point (AP) station, which shares this with APs on overlapping BSSs. Information is exchanged between stations advertising that a coming TXOP is available to be shared, and identifying stations that are willing to join it. Resource unit (RU) distributions are determined for the participant stations to use in sharing the TXOP, while the AP of the OBSS performs scheduling and distribution of RUs for stations in the OBSS.
    Type: Application
    Filed: January 19, 2021
    Publication date: December 30, 2021
    Applicant: SONY CORPORATION
    Inventors: Qing Xia, Mohamed Abouelseoud, Liangxiao Xin
  • Publication number: 20210410149
    Abstract: A wireless local area network (WLAN) protocol allowing a Transmit Opportunity (TXOP) holder to share the TXOP with other stations acting cooperatively. An intent to share the TXOP is communicated to other stations that a TXOP is available for sharing, and notifying the Access Point (AP) station of the stations willing to join that TXOP. When the TXOP occurs, the stations can access the channel over different frequency domain simultaneously and for the duration specified, thus providing increased use of the TXOP to improve efficiency.
    Type: Application
    Filed: January 5, 2021
    Publication date: December 30, 2021
    Inventors: Qing Xia, Mohamed Abouelseoud, Liangxiao Xin
  • Patent number: 11202314
    Abstract: A wireless communication circuit configured for communicating over a wireless local area network (WLAN) in its reception area to communicate real-time application (RTA) packets as well as non-real time (non-RTA) packets. RTA packet retransmission is performed with lower latency in response to performing an immediate retransmission scheme that can bypass the need to contend for channel access, and/or without waiting for notifications back from a receiver before channel access. In other instances the RTA packets contend for retransmission access without a contention time window increase.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: December 14, 2021
    Assignee: SONY GROUP CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud, Kazuyuki Sakoda
  • Patent number: 11178694
    Abstract: A wireless communication circuit for operating over a wireless local area network (WLAN) in which real time application (RTA) traffic and non-RTA traffic coexist and are distinguished from one another. RTA queues are created to enqueue RTA packets while non-RTA packets are pushed into non-RTA queues. Management frames containing RTA session parameters and RTA queue setting information are exchanged between stations. Channel time is allocated to RTA queues for transmitting packets, during which non-RTA queues are not allowed to access the channel. Stations determine which RTA queues to enqueue an RTA packet into based on RTA queue classification information of its RTA session.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: November 16, 2021
    Assignee: SONY GROUP CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud, Kazuyuki Sakoda
  • Publication number: 20210352722
    Abstract: A wireless station and protocols for a wireless local area network (WLAN) to support real-time application (RTA) packets in setting up an unsolicited retry policy for RTA packets within a TXOP in which the station retransmits RTA packets in time and frequency domains without waiting for feedback. Setting up block acknowledgement (BA) agreements to receive feedback for adapting future packet transmissions. Dropping an RTA packet if a retry count for that packet exceeds the unsolicited retry limit, or a lifetime of that packet has expired. Supporting multi-link devices (MLDs) including access point multi-link devices (AP-MLDs) for performing simultaneous transmit/receive (STR), and non-access point multi-link device (non-AP MLDs) which are not configured for simultaneous transmit/receive (non-STR).
    Type: Application
    Filed: December 9, 2020
    Publication date: November 11, 2021
    Inventors: Liangxiao Xin, Mohamed Abouelseoud
  • Publication number: 20210337594
    Abstract: A wireless local area network (WLAN) supporting real-time application (RTA) packets that are sensitive to communication delays as well as non-real time packets over a network supporting carrier sense multiple access/collision avoidance (CSMA/CA) using enhanced distributed channel access (EDCA) in an EDCA queue system. At least one new access class (AC) and associated transmit queue for enqueuing RTA packets while non-RTA packets are enqueued to the original transmit queues in the EDCA queue system. A new EDCA function (EDCAF) is created for the new access class (AC) transmit queue for RTA packets in which the RTA queue is able to contend for channel before expected RTA packets arrival.
    Type: Application
    Filed: November 16, 2020
    Publication date: October 28, 2021
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud
  • Publication number: 20210315009
    Abstract: A wireless local area network (WLAN) protocol allowing a Transmit Opportunity (TXOP) holder to share the TXOP with other stations. An intent to share the TXOP is communicated to the Access Point (AP). Upon gaining channel access, the TXOP holder directly or indirectly communicates that the TXOP can be shared with other STAs, after which scheduling information (time and duration) are shared with the STAs. When the TXOP occurs, the STAs can access the channel at the time and for the duration specified, thus providing increased use of the TXOP to improve efficiency.
    Type: Application
    Filed: October 13, 2020
    Publication date: October 7, 2021
    Applicant: SONY CORPORATION
    Inventors: Qing Xia, Mohamed Abouelseoud, Liangxiao Xin
  • Publication number: 20210306271
    Abstract: A wireless local area network (WLAN) station and protocol configured to support communicating real-time application (RTA) packets that are sensitive to communication delays as well as non-real time packets over a network supporting within traffic stream (TS) operations in which real time application (RTA) traffic and non-RTA traffic coexist. Stations can request establishing a traffic stream from neighboring stations, which can accept or deny the TS for the RTA stream. Additional information can be passed in requesting the stream or by the responder for denying the stream.
    Type: Application
    Filed: July 7, 2020
    Publication date: September 30, 2021
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud
  • Publication number: 20210307069
    Abstract: A WiFi communications mechanism in which simultaneous transmission is negotiated and beamforming communications performed towards at least one station (STA), while nulling is performed towards one or more other access points (APs) to reduce interference. Omni-directional transmissions are utilized in a manner to overcome preamble interferences, which is used in combination with synchronizing symbol intervals to eliminate interference from symbol transitions. The enhanced simultaneous transmission protocol allows two APs to transmit simultaneously without interfering with one another.
    Type: Application
    Filed: July 31, 2020
    Publication date: September 30, 2021
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud, Qing Xia, Kazuyuki Sakoda, Hiromasa Uchiyama, Yusuke Tanaka, Kosuke Aio, Ryuichi Hirata, Ken Tanaka, Thomas Handte, Dana Ciochina
  • Patent number: 11122624
    Abstract: Performing a pre-packet arrival channel contention procedure in stations of a WLAN to enhance support for real-time applications (RTAs) which are sensitive to communication delays. The stations track active real-time application sessions and identify running RTA sessions with respect to communication times, rates and packet sizes. A station attempts to gain access to the communication channel using a pre-packet arrival channel contention process before a packet arrives from the application layer of an RTA, based on information received from the RTA as to what time the packet will arrive to a MAC queue in a MAC layer of the wireless station. Thus, the RTA packets incur less delay while the process can also reduce communications overhead.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: September 14, 2021
    Assignee: SONY GROUP CORPORATION
    Inventors: Mohamed Abouelseoud, Kazuyuki Sakoda, Liangxiao Xin
  • Publication number: 20210195683
    Abstract: A Real-Time Application (RTA) interface between the Medium Access Control (MAC) and Application (APP) layers of interworking communications in the OSI model for use in wireless local area networks (WLANs). The interface between MAC and APP layers can be utilized for RTA packets, while non-RTA packets can still use the regular OSI model. In initializing a new RTA session the APP layer communicates a set of requirements to the MAC layer. The MAC layer monitors the channel and measures key performance indicators (KPIs) and either accepts or rejects the request. The interoperability between the APP and MAC layers provide enhanced abilities to reduce RTA packet latencies, as well as other benefits.
    Type: Application
    Filed: August 20, 2020
    Publication date: June 24, 2021
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud, Kazuyuki Sakoda
  • Publication number: 20210126695
    Abstract: Reducing the effects of path loss in millimeter wave (mmWave) directional communications by performing channel measurements estimating non-line of sight (NLOS) blockages, to determine angle-of-departure (AoD) and angle-of-arrival (AoA) and gain of identified paths so that directional antennas can be reconfigured to overcome unfavorable propagation conditions and reduce path losses.
    Type: Application
    Filed: July 31, 2020
    Publication date: April 29, 2021
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Sarankumar Balakrishnan
  • Publication number: 20210076420
    Abstract: A wireless communication circuit for operating over a wireless local area network (WLAN) in which real time application (RTA) traffic and non-RTA traffic coexist and are distinguished from one another. RTA queues are created to enqueue RTA packets while non-RTA packets are pushed into non-RTA queues. Management frames containing RTA session parameters and RTA queue setting information are exchanged between stations. Channel time is allocated to RTA queues for transmitting packets, during which non-RTA queues are not allowed to access the channel. Stations determine which RTA queues to enqueue an RTA packet into based on RTA queue classification information of its RTA session.
    Type: Application
    Filed: January 22, 2020
    Publication date: March 11, 2021
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud, Kazuyuki Sakoda
  • Publication number: 20210029750
    Abstract: A wireless communication circuit for operating over a wireless local area network (WLAN) supporting carrier sense multiple access/collision avoidance (CSMA/CA) in which real time application (RTA) traffic and non-RTA traffic coexist. Channel time is scheduled for transmitting real-time application (RTA) traffic based on expected RTA packet arrival time, with the schedule being shared with neighboring stations. Schedule time is adjusted based on schedules of neighboring stations to prevent channel contention collisions of multiple RTA traffics contending for the channel. Various mechanisms are described for supporting RTA transmissions while reducing channel access latency and contention collision.
    Type: Application
    Filed: December 13, 2019
    Publication date: January 28, 2021
    Applicant: SONY CORPORATION
    Inventors: Liangxiao Xin, Mohamed Abouelseoud, Kazuyuki Sakoda
  • Publication number: 20210007137
    Abstract: Systems, apparatus and methods for wireless local area network (WLAN) communication which support real-time application (RTA) packets. The access point (AP) schedules multiple-user (MU) multiple-input-multiple-output (MIMO) transmissions for uplink (UL) or downlink (DL) for RTA packets by allocating resources to packet transmissions before RTA packet arrival. The AP contends for channel access before the expected time of arrival of the RTA packet in the DL or UL direction. The operations reduce RTA packet latency on the WLAN.
    Type: Application
    Filed: December 11, 2019
    Publication date: January 7, 2021
    Applicant: SONY CORPORATION
    Inventors: Mohamed Abouelseoud, Kazuyuki Sakoda, Liangxiao Xin