Patents by Inventor Sai Yiu Duncan Ho

Sai Yiu Duncan Ho 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: 20230189337
    Abstract: This disclosure provides methods, devices and systems for providing energy detection based resolution in radio access technologies. In one aspect, a wireless communication device may include a first energy detection threshold (EDT) to identify a transmission opportunity in an unlicensed frequency band. The wireless communication device may detect a second wireless communication device having a second EDT to identify the transmission opportunity, the second EDT being greater than the first EDT. The wireless communication device may, based on detection of the second wireless communication device having the second EDT, modify a transmission configuration of the first wireless communication device.
    Type: Application
    Filed: November 19, 2021
    Publication date: June 15, 2023
    Inventors: Yanjun SUN, George CHERIAN, Maarten Menzo WENTINK, Sai Yiu Duncan HO, Abhishek Pramod PATIL, Alfred ASTERJADHI, Gaurang NAIK, Abdel Karim AJAMI
  • Publication number: 20230180047
    Abstract: This disclosure provides methods and devices for managing the allocation of resources for uplink (UL) and downlink (DL) transmissions associated with a scheduled time period. In some implementations, a wireless station (STA) transmits, to an access point (AP), a request frame indicating a bandwidth or a quantity of spatial streams (or both) for the UL transmissions, and indicating a bandwidth or a quantity of spatial streams (or both) for the DL transmissions. In some instances, the request frame also may indicate the STA's intention to transmit UL data as duplicates carried on different communication links. The STA receives a trigger frame indicating that the STA is scheduled to transmit or receive data during the time period. The STA transmits data to, or receives data from, one or more other devices during the time period.
    Type: Application
    Filed: December 7, 2021
    Publication date: June 8, 2023
    Inventors: Abdel Karim AJAMI, Alfred ASTERJADHI, Sai Yiu Duncan HO, George CHERIAN, Abhishek Pramod PATIL, Yanjun SUN, Gaurang NAIK
  • Patent number: 11665760
    Abstract: This disclosure provides systems, methods, and apparatus for wireless communications. In one aspect, an apparatus may obtain, for a first access point (AP), a first service set identifier (SSID) associated with single-link communications and obtain, for a second AP, a second SSID associated with multi-link communications. The apparatus may obtain, from a wireless communication device, a management frame include a multi-link operation information field that carries a first SSID and obtain a multi-link indication for the wireless communication device based, at least in part, on the first SSID, the multi-link indication indicating whether the wireless communication device includes AP capable of link aggregation, and selectively associate with the wireless communication device based on the multi-link indication.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: May 30, 2023
    Assignee: QUALCOMM INCORPORATED
    Inventors: Sai Yiu Duncan Ho, Abhishek Pramod Patil, George Cherian, Alfred Asterjadhi, Yanjun Sun
  • Publication number: 20230155782
    Abstract: This disclosure provides methods, devices and systems for transmitting and receiving, between an access point (AP) and one or more stations (STAs) in a basic service set (BSS), an indication of a puncturing event. In some examples, the transmitting and receiving may use non-legacy elements configured to provide information about the puncturing event. In certain aspects, the disclosure provides methods for transmitting and receiving, between the AP and one or more STAs, an indication of an operating band switch. In some examples, the transmitting and receiving may use non-legacy elements configured to provide information about the operating band switch.
    Type: Application
    Filed: November 17, 2021
    Publication date: May 18, 2023
    Inventors: Yanjun SUN, Alfred ASTERJADHI, Abhishek Pramod PATIL, George CHERIAN, Sai Yiu Duncan HO, Gaurang NAIK, Abdel Karim AJAMI, Sandip HOMCHAUDHURI
  • Publication number: 20230156793
    Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for signaling parameters for peer-to-peer communications in a wireless network. One aspect provides a method for wireless communications at an access point (AP). The method generally includes: obtaining, from an access point (AP), a transmission opportunity (TXOP) sharing trigger indicating a duration in which a TXOP is shared by the wireless station and one or more other devices; relaying, to the one or more other devices, information identifying parameters for wireless communications between the wireless station and the one or more other devices; and during the TXOP, communicating with the one or more other devices based on the parameters for wireless communications between the wireless station and the one or more other devices.
    Type: Application
    Filed: November 12, 2021
    Publication date: May 18, 2023
    Inventors: Abdel Karim AJAMI, Yanjun SUN, George CHERIAN, Sai Yiu Duncan HO, Alfred ASTERJADHI, Abhishek Pramod PATIL, Gaurang NAIK
  • Patent number: 11653394
    Abstract: This disclosure provides methods, devices and systems for synchronized channel access. Some implementations more specifically relate to facilitating coexistence among wireless communication devices that support synchronized channel access and those that do not. A group of access points may schedule periodically recurring, synchronized channel access periods by periodically transmitting quiet elements. The quiet elements establish recurring quiet periods during which legacy devices are not permitted to transmit. In some implementations, an access point may transmit one or more quiet override elements each associated with a respective quiet element and indicating to other access points supporting synchronized channel access that they are permitted to contend for access during the respective quiet period.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: May 16, 2023
    Assignee: QUALCOMM INCORPORATED
    Inventors: Alfred Asterjadhi, Lochan Verma, George Cherian, Abhishek Pramod Patil, Sai Yiu Duncan Ho
  • Publication number: 20230146138
    Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for signaling between an access point (AP) multi-link device (MLD) and a non-AP MLD that support multi-link communication in a wireless local area network (WLAN). In some implementations, a multi-link association may include a first link (referred to as an anchor link) and one or more other links (referred to as auxiliary links). The signaling may include control information to activate or deactivate auxiliary links dynamically based on communication load, throughput requirements, or quality of service (QoS). The signaling also may include requests, acknowledgments, or negotiation regarding multi-link connections. Furthermore, signaling and timing information may be used to coordinate when auxiliary links are used for communication or when to promote an auxiliary link to an anchor link.
    Type: Application
    Filed: October 24, 2022
    Publication date: May 11, 2023
    Inventors: Alfred Asterjadhi, Abhishek Pramod Patil, George Cherian, Sai Yiu Duncan Ho, Lochan Verma
  • Publication number: 20230140991
    Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for increasing local area network (LAN) device privacy. One aspect provides a method for wireless communications at an access point (AP). The method generally includes: determining a mapping between a first distribution system (DS) medium access control (MAC) address and a second DS MAC address; obtaining, from a source access terminal, a frame having the second DS MAC address; and sending at least a portion of the frame to a target access terminal based on the mapping between the first MAC address and the second MAC address.
    Type: Application
    Filed: November 10, 2021
    Publication date: May 11, 2023
    Inventors: Philip Michael HAWKES, George CHERIAN, Sai Yiu Duncan HO, Jouni Kalevi Malinen
  • Publication number: 20230144291
    Abstract: Certain aspects of the present disclosure relate to wireless communications and, more particularly, to multi-link communications. A method that may be performed by an access point (AP) multi-link device (MLD) includes establishing a plurality of links for communication with a non-AP MLD, wherein one or more non-AP MLDs, including the non-AP MLD, communicate with the AP on each link of the plurality of links and taking one or more actions designed to ensure that the non-AP MLD is able to receive a group addressed frame. The non-AP MLD is operating in an enhanced multi-link single radio (EMLSR) mode.
    Type: Application
    Filed: November 8, 2021
    Publication date: May 11, 2023
    Inventors: Gaurang NAIK, Abhishek Pramod PATIL, Alfred ASTERJADHI, George CHERIAN, Sai Yiu Duncan HO, Yanjun SUN, Abdel Karim AJAMI
  • Publication number: 20230140312
    Abstract: This disclosure provides methods, devices and systems for protecting latency-sensitive communications during restricted target wake time (r-TWT) service periods (SPs). Some implementations more specifically relate to coordinated scheduling of r-TWT SPs between OBSSs. In some aspects, a first AP may coordinate with a second AP in scheduling r-TWT SPs so that latency-sensitive traffic in a first BSS does not interfere or collide with latency-sensitive traffic in a second BSS overlapping the first BSS. In some implementations, the first and second APs may schedule their respective r-TWT SPs to be orthogonal in time. In some other implementations, the first and second APs may schedule their r-TWT SPs to overlap in time, while allocating coordinated resources to concurrent or overlapping latency-sensitive traffic in the first and second BSSs (such as in accordance with one or more multi-AP coordination techniques).
    Type: Application
    Filed: November 1, 2021
    Publication date: May 4, 2023
    Inventors: Abdel Karim Ajami, Sai Yiu Duncan Ho, George Cherian, Alfred Asterjadhi, Abhishek Pramod Patil, Yanjun Sun, Gaurang Naik
  • Publication number: 20230137826
    Abstract: This disclosure provides systems and methods for requesting wireless resources for peer-to-peer (P2P) communications. In some implementations, a wireless communication device transmits a frame over a wireless medium to an access point (AP), the frame including a medium access control (MAC) header carrying a request for the AP to allocate part of a transmission opportunity (TXOP) for P2P communications between the wireless communication device and a client device. The wireless communication device receives a trigger frame allocating a portion of the TXOP for the P2P communications, and transmits or receives P2P data to or from the client device over the wireless medium during the allocated portion of the TXOP. In some instances, the MAC header of the frame includes a Quality-of-Service (QoS) Control field carrying the request. In some other instances, the MAC header of the frame includes an Aggregated-Control (A-Control) subfield carrying the request.
    Type: Application
    Filed: October 28, 2021
    Publication date: May 4, 2023
    Inventors: Abdel Karim AJAMI, Sai Yiu Duncan HO, George CHERIAN, Alfred ASTERJADHI, Abhishek Pramod PATIL, Yanjun SUN, Gaurang NAIK
  • Patent number: 11638146
    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for onboarding one or more Multi-AP devices using a device provisioning protocol (DPP) and a Multi-AP communication protocol. In one aspect, a first Multi-AP device may determine, during an onboarding process, DPP configuration information that was derived using the DPP. The first Multi-AP device may establish a Multi-AP network configuration between the first Multi-AP device and a second Multi-AP device using the Multi-AP communication protocol based, at least in part, on the DPP configuration information. In one aspect, the DPP configuration information may be derived remotely by the network operator prior to device deployment. In one aspect, a configurator station (STA) may be delegated as the DPP configurator by the network operator, and may onboard one or more STAs into the Multi-AP network using the DPP and the Multi-AP communication protocol.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: April 25, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Rosario Cammarota, Sai Yiu Duncan Ho, Brian Michael Buesker
  • Patent number: 11627526
    Abstract: Various aspects of the techniques, methods and devices described in this disclosure relate generally to achieving coexistence between WLAN and P2P networks, and specifically, to coordinated D2D communications. Some aspects particularly involve extending the capabilities of TWT elements transmitted by APs to support periodic reserved access windows during which D2D-enabled wireless devices are permitted to transmit direct wireless communications. Some other aspects relate to sharing time and frequency resources via CAP TDMA or CAP OFDMA techniques, and specifically, to allocating at least some of the time and frequency resources specifically for D2D communications.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: April 11, 2023
    Assignee: QUALCOMM INCORPORATED
    Inventors: George Cherian, Alfred Asterjadhi, Abhishek Pramod Patil, Lochan Verma, Sai Yiu Duncan Ho
  • Publication number: 20230104446
    Abstract: This disclosure provides systems, methods, and apparatus for managing data traffic in restricted target wake time (TWT) service periods (SPs). In some aspects, an access point (AP) receives a request frame from a wireless station (STA) associated with a client device via a peer-to-peer (P2P) link, the request frame indicating that the STA intends to exchange P2P communications with the client device during a r-TWT SP scheduled on a wireless medium. The AP obtains a transmission opportunity (TXOP) on the wireless medium during the r-TWT SP, the request frame identifying the client device. The AP transmits a trigger frame on the wireless medium responsive to obtaining the TXOP, the trigger frame allocating a portion of the obtained TXOP for P2P communications between the STA and the client device, wherein at least one of the response frame or the trigger frame indicates a Network Allocation Vector (NAV) exception for the client device.
    Type: Application
    Filed: September 22, 2021
    Publication date: April 6, 2023
    Inventors: Abdel Karim AJAMI, Sai Yiu Duncan Ho, George Cherian, Alfred Asterjadhi, Abhishek Pramod Patil, Yanjun Sun, Gaurang Naik
  • Publication number: 20230108990
    Abstract: This disclosure provides methods, devices and systems for synchronized channel access. Some implementations more specifically relate to facilitating coexistence among wireless communication devices that support synchronized channel access and those that do not. A group of access points may schedule periodically recurring, synchronized channel access periods by periodically transmitting quiet elements. The quiet elements establish recurring quiet periods during which legacy devices are not permitted to transmit. In some implementations, an access point may transmit one or more quiet override elements each associated with a respective quiet element and indicating to other access points supporting synchronized channel access that they are permitted to contend for access during the respective quiet period.
    Type: Application
    Filed: December 12, 2022
    Publication date: April 6, 2023
    Inventors: Alfred Asterjadhi, Lochan Verma, George Cherian, Abhishek Pramod Patil, Sai Yiu Duncan Ho
  • Publication number: 20230098093
    Abstract: This disclosure provides methods, devices and systems for using a pseudonym service set identifier (pSSID) for access point (AP) and station (STA) privacy. For example, a pSSID is included by a STA or AP in place of a persistent SSID for over the air communications used for various functions (such as for the STA to determine the SSID of the AP before connecting to the AP). The pSSID is generated using a hash function that is defined at both the AP and the STA. An input to the hash function includes the SSID. Other inputs may include a temporary media access control (MAC) address of the device generating the pSSID, a time value associated with a time when the pSSID is generated, or a location value associated with a position measurement of the device generating the pSSID.
    Type: Application
    Filed: November 30, 2021
    Publication date: March 30, 2023
    Inventors: Philip Michael HAWKES, Sai Yiu Duncan Ho, Jouni Kalevi Malinen, Soo Bum Lee, George Cherian, Anand Palanigounder
  • Publication number: 20230087211
    Abstract: This disclosure provides methods, devices and systems for using a variable authentication identifier (AID) for access point (AP) privacy. For example, instead of a persistent SSID, an AID is used by a station (STA) to authenticate the AP before connecting to the AP. The AP is associated with a service set, and the STA has stored a secret token associated with the service set. Before connecting to the AP, a broadcasted probe request from the STA includes no identifying information other than the token. The AP generates the AID from the token and provides the AID in a probe response. The STA is able to identify the AP as being associated with a service set and connect to the AP using the token and AID without the token and the AID being used by another device not associated with the service set to identify the AP.
    Type: Application
    Filed: September 23, 2021
    Publication date: March 23, 2023
    Inventors: Philip Michael Hawkes, Sai Yiu Duncan Ho, Jouni Kalevi Malinen, Soo Bum Lee, George Cherian, Anand Palanigounder
  • Publication number: 20230087887
    Abstract: This disclosure provides methods, devices and systems for protecting latency-sensitive communications, during restricted target wake time (r-TWT) service periods (SPs), from non-legacy STAs that do not support r-TWT operation. Some implementations more specifically relate to preventing STAs that are not members of an r-TWT SP from acquiring transmit opportunities (TXOPs) that would otherwise overlap with the start of the r-TWT SP. In some implementations, the AP may require all non-legacy STAs associated with its basic service set (BSS) to support r-TWT operation. In some other implementations, the AP may attempt to capture a wireless channel associated with the r-TWT SP within a fixed period preceding the r-TWT SP. In some other implementations, the AP may require all associated STAs to transmit a request-to-send (RTS) frame when attempting to acquire a TXOP. Still further, in some implementations, the AP may limit the duration of TXOPs acquired by non-member STAs.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 23, 2023
    Inventors: Abdel Karim AJAMI, Sai Yiu Duncan Ho, George Cherian, Alfred Asterjadhi, Abhishek Pramod Patil, Yanjun Sun, Gaurang Naik
  • Patent number: 11606713
    Abstract: This disclosure provides methods, devices and systems for communicating over multiple links, for example, indicating buffered units (BUs) per traffic identifier (TID) for transmission to multi-link devices (MLDs). One innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication. The method can be performed, for example, by a non-access point (non-AP) MLD. The non-AP MLD can receive an indication of an association identifier (AID) associated with the non-AP MLD, wherein the indication of the AID indicates whether an AP has BUs for the non-AP MLD, determine one or more links associated with one or more TIDs based on a mapping of a plurality of TIDs, including the one or more TIDs, to a plurality of links, including the one or more links, receive the BUs associated with the one or more TIDs from the AP on the determined links.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: March 14, 2023
    Assignee: QUALCOMM INCORPORATED
    Inventors: George Cherian, Abhishek Pramod Patil, Sai Yiu Duncan Ho, Yanjun Sun, Alfred Asterjadhi
  • Publication number: 20230053972
    Abstract: A wireless station (STA) operating as a non-simultaneous transmit-receive (NSTR) soft access point (AP) multi-link device (MLD) associated with a primary link and a non-primary link determines that the non-primary link is unavailable, and transmits, on only the primary link, a frame carrying an indication of the unavailability of the non-primary link. The NSTR softAP MLD may set a Do Not Transmit (DNT) bit to a value of 1 and may operate as a single-link device on the primary link based on the unavailability of the non-primary link. In some instances, the NSTR softAP MLD determines that the non-primary link is available while operating as the single-link device on the primary link, resets the DNT bit based on the availability of the non-primary link, and transmits the reset DNT bit in another frame on only the primary link.
    Type: Application
    Filed: August 23, 2021
    Publication date: February 23, 2023
    Inventors: Abhishek Pramod PATIL, George CHERIAN, Alfred ASTERJADHI, Sai Yiu Duncan HO, Yanjun SUN, Gaurang NAIK, Tushnim BHATTACHARYYA, Vikram PHOGAT