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: 20220124857
    Abstract: Certain aspects of the present disclosure provide techniques for handling direct link communications in multi-link systems. An example method generally includes transmitting, to a first wireless station via a direct link between the first wireless station and one or more second wireless stations affiliated with a multi-link device (MLD), a data frame comprising a transmitter address field set to an address of the MLD, which is one of a plurality of addresses associated with the MLD and the second wireless stations being affiliated with the MLD for multi-link operations. The method also includes communicating with the first wireless station via the direct link.
    Type: Application
    Filed: October 18, 2021
    Publication date: April 21, 2022
    Inventors: Abhishek Pramod PATIL, George CHERIAN, Sai Yiu Duncan HO, Alfred ASTERJADHI, Yanjun SUN, Vikram PHOGAT, Tushnim BHATTACHARYYA, Rajesh CHAUHAN
  • Publication number: 20220124856
    Abstract: Certain aspects of the present disclosure provide techniques for handling direct link communications in multi-link systems. An example method generally includes transmitting, to a first wireless station via a direct link between the first wireless station and one or more second wireless stations affiliated with a multi-link device (MLD), a data frame comprising a transmitter address field set to an address of the MLD, which is one of a plurality of addresses associated with the MLD and the second wireless stations being affiliated with the MLD for multi-link operations. The method also includes communicating with the first wireless station via the direct link.
    Type: Application
    Filed: October 18, 2021
    Publication date: April 21, 2022
    Inventors: Abhishek Pramod PATIL, George CHERIAN, Sai Yiu Duncan HO, Alfred ASTERJADHI, Yanjun SUN, Vikram PHOGAT, Tushnim BHATTACHARYYA, Rajesh CHAUHAN
  • Patent number: 11310690
    Abstract: Certain aspects relate to methods and apparatus for traffic flow service prioritization in a multi AP (MAP) network.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: April 19, 2022
    Assignee: QUALCOMM INCORPORATED
    Inventors: Xiaolong Huang, Bharat Bhushan, Brian Michael Buesker, Sai Yiu Duncan Ho
  • Publication number: 20220085910
    Abstract: This disclosure provides methods, devices and systems for enhanced bandwidth puncturing. Some implementations more specifically relate to punctured channel indications that support channel puncturing over a range of bandwidths achievable in accordance with the Institute of Electrical and Electronics Engineers (IEEE) 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an access point (AP) may communicate static punctured channel information to each associated wireless station (STA) in its BSS. In some other implementations, a transmit opportunity (TXOP) holder may communicate dynamic punctured channel information to a TXOP responder with which it intends to communicate. Still further, in some implementations, the TXOP responder may communicate additional punctured channel information to the TXOP holder responsive to the dynamic punctured channel information.
    Type: Application
    Filed: September 13, 2021
    Publication date: March 17, 2022
    Inventors: Yanjun SUN, Alfred Asterjadhi, George Cherian, Abhishek Pramod Patil, Sai Yiu Duncan Ho
  • Publication number: 20220078844
    Abstract: In some implementations, an access point (AP) establishes a restricted target wake time (TWT) session including at least one restricted TWT service period (SP) for peer-to-peer (P2P) communications. The AP admits a group of wireless stations (STAs) associated with P2P communications as members of the restricted TWT session, obtains a transmission opportunity (TXOP) on the wireless channel during the at least one restricted TWT SP, and transmits, on the wireless channel, a protection frame identifying one or more STAs of the group of STAs belonging to the restricted TWT session that are permitted to transmit or receive P2P communications on the wireless channel during the TXOP. The protection frame may also indicate to receiving devices other than the one or more identified STAs that the wireless channel is unavailable for at least a portion of the TXOP.
    Type: Application
    Filed: August 30, 2021
    Publication date: March 10, 2022
    Inventors: George CHERIAN, Alfred ASTERJADHI, Yanjun SUN, Sai Yiu Duncan HO, Abhishek Pramod PATIL
  • Publication number: 20220070772
    Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication that can be used to establish a restricted target wake time (TWT) session on a wireless medium. In some implementations, an access point (AP) establishes a restricted TWT session for one or more wireless stations (STAs) associated with latency sensitive traffic, the restricted TWT session including restricted TWT service periods (SPs) during which the AP reserves access to the wireless medium for only the one or more STAs associated with the latency sensitive traffic. The AP transmits a clear-to-send (CTS) frame at a start of each restricted TWT SP, the CTS frame indicating to other STAs that the wireless medium is unavailable for a duration of the respective restricted TWT SP. The AP transmits latency sensitive data to or receives latency sensitive data from the one or more STAs during at least one of the restricted TWT SPs.
    Type: Application
    Filed: August 26, 2021
    Publication date: March 3, 2022
    Inventors: Sai Yiu Duncan HO, George CHERIAN, Abhishek Pramod PATIL, Yanjun SUN, Alfred ASTERJADHI
  • Publication number: 20220053379
    Abstract: This disclosure provides methods, devices and systems for enhanced bandwidth negotiation. Some implementations more specifically relate to request-to-transmit (RTS) and clear-to-send (CTS) frame designs that support bandwidth negotiations over a range of bandwidths achievable in accordance with the IEEE 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, a bandwidth negotiation frame (such as a CTS or RTS frame) may be configurable to support bandwidths greater than 160 MHz. In some aspects, the bandwidth negotiation frame may conform to a legacy control frame format. More specifically, one or more bits of a service field associated with the legacy control frame format may be repurposed to carry enhanced bandwidth information. In some aspects, a recipient of a bandwidth negotiation frame may interpret one or more bits of the service field to carry enhanced bandwidth information when the frame is transmitted by a non-legacy transmitting device.
    Type: Application
    Filed: August 6, 2021
    Publication date: February 17, 2022
    Inventors: Yanjun SUN, Alfred ASTERJADHI, George CHERIAN, Abhishek Pramod PATIL, Sai Yiu Duncan HO
  • Publication number: 20220022033
    Abstract: This disclosure provides methods, devices and systems that facilitate mobility of wireless communication devices configured for multi-link operation (MLO). Particular aspects more specifically relate to facilitating fast basic service set (BSS) transitions by wireless communication devices that support MLO. For example, some aspects provide support for station (STA) multi-link device (MLD) roaming between access point (AP) MLDs, from an AP MLD to a non-MLO AP, or from a non-MLO AP to an AP MLD. In some aspects, a STA MLD may be configured to use a medium access control (MAC) service access point address (MAC-SAP address) of the AP MLD when re-associating or communicating with a legacy AP or with an AP MLD. In such aspects, the MAC-SAP address may be used by all STAs of the non-AP MLD for fast BSS transitions.
    Type: Application
    Filed: June 28, 2021
    Publication date: January 20, 2022
    Inventors: Sai Yiu Duncan HO, George CHERIAN, Abhishek Pramod PATIL, Alfred ASTERJADHI, Yanjun SUN, Jouni Kalevi MALINEN
  • Patent number: 11228963
    Abstract: This disclosure provides systems, methods, and apparatuses for associating a wireless communication device such as a wireless station (STA) of a STA multi-link device (MLD) with an access point (AP) MLD that includes a first AP associated with a first communication link of the AP MLD and includes one or more secondary APs associated with one or more respective secondary communication links of the first AP MLD. The AP MLD transmits a frame including an advertising information element carrying discovery information for the first AP of the AP MLD, including a first portion carrying discovery information for each secondary AP of the one or more secondary APs of the AP MLD, and including a second portion carrying common attributes of the one or more secondary APs of the AP MLD.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: January 18, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Abhishek Pramod Patil, George Cherian, Alfred Asterjadhi, Sai Yiu Duncan Ho, Lochan Verma, Yanjun Sun
  • Publication number: 20210378039
    Abstract: Disclosed are techniques for wireless communication. In an aspect, an access point (AP) communicates with at least one wireless station (STA) and supporting a plurality of communication devices and communication modes on a communication medium, establishes a single-link communication mode with the at least one wireless STA and at least one communication device of the plurality of communication devices over a single-link, establishes a multi-link communication mode with the at least one wireless STA and the at least one communication device over a multi-link, and dynamically transitions between the single-link communication mode and the multi-link communication mode based upon a determination related to a best mode of delivery for a next period.
    Type: Application
    Filed: May 25, 2021
    Publication date: December 2, 2021
    Inventors: George CHERIAN, Sai Yiu Duncan HO, Abhishek Pramod PATIL, Alfred ASTERJADHI, Yanjun SUN
  • Publication number: 20210377369
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiver device may receive a management frame addressed to the receiver device; parse the management frame to identify a link identifier included in the management frame; associate the link identifier with link information included in the management frame; and update, based at least in part on the link information, a communication configuration for a link identified by the link identifier. Numerous other aspects are provided.
    Type: Application
    Filed: May 21, 2021
    Publication date: December 2, 2021
    Inventors: Abhishek Pramod PATIL, Sai Yiu Duncan HO, George CHERIAN, Alfred ASTERJADHI, Yanjun SUN
  • Publication number: 20210321243
    Abstract: A first access point (AP) of an AP multi-link device (MLD) is associated with a first communication link, and one or more secondary APs of the AP MLD are associated with one or more respective secondary communication links of the AP MLD. The first AP of the AP MLD generates a frame including a first change sequence field and one or more secondary change sequence fields. The first change sequence field indicates a presence or absence of a critical update associated with the first communication link, and each of the one or more secondary change sequence fields indicates a presence or absence of a critical update associated with a corresponding secondary communication link of the AP MLD. The first AP of the AP MLD transmits the frame over the first communication link of the AP MLD to a station (STA) of a STA MLD.
    Type: Application
    Filed: April 7, 2021
    Publication date: October 14, 2021
    Inventors: Abhishek Pramod PATIL, Sai Yiu Duncan HO, George CHERIAN, Alfred ASTERJADHI, Yanjun SUN
  • Publication number: 20210321410
    Abstract: An access point (AP) of an AP multi-link device (MLD) is associated with a first communication link, and one or more secondary APs of the AP MLD are associated with one or more respective secondary communication links of the AP MLD. The first AP of the AP MLD generates a frame including a first change sequence field, one or more secondary change sequence fields, and a critical update flag subfield. The first change sequence field carries a value of the most-recent critical update for the first AP. The one or more secondary change sequence fields carry values of the most-recent critical updates for the one or more respective secondary APs. The critical update flag subfield carries an indication of a change in value of at least one of the secondary change sequence fields. The first AP transmits the frame over the first communication link of the AP MLD.
    Type: Application
    Filed: April 7, 2021
    Publication date: October 14, 2021
    Inventors: Abhishek Pramod PATIL, George CHERIAN, Alfred ASTERJADHI, Sai Yiu Duncan HO, Yanjun SUN, Sandip HOMCHAUDHURI, Yongchun XIAO
  • Publication number: 20210289575
    Abstract: Aspects of the present disclosure generally relate to wireless communications and, more particularly, to techniques for managing multi-link communications. Some aspects of the present disclosure provide techniques for configuring data unit and control response transmissions on multiple links. The data unit and control responses may be configured such that a control response transmission does not overlap with a data unit reception at a station that is without simultaneous transmission and reception capability.
    Type: Application
    Filed: March 10, 2021
    Publication date: September 16, 2021
    Inventors: George CHERIAN, Alfred ASTERJADHI, Abhishek Pramod PATIL, Sai Yiu Duncan HO, Yanjun SUN
  • Publication number: 20210282047
    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: Application
    Filed: March 2, 2021
    Publication date: September 9, 2021
    Inventors: George CHERIAN, Abhishek Pramod PATIL, Sai Yiu Duncan HO, Yanjun SUN, Alfred ASTERJADHI
  • Publication number: 20210282161
    Abstract: This disclosure provides methods, devices and systems for sharing resources of a wireless medium. Particular implementations relate more specifically to coordinated AP (CAP) time-division-multiple-access (TDMA) and orthogonal-frequency-division-multiple access (OFDMA) techniques for sharing the time or frequency resources of a transmission opportunity (TXOP). According to such techniques, an AP that wins contention and gains access to the wireless medium for the duration of a TXOP may share its time or frequency resources with other selected APs. To share its resources, the winning AP may partition the TXOP into multiple time or frequency segments each including respective time or frequency resources representing a portion of the TXOP, and allocate each of the time or frequency segments to itself or to one of the selected APs.
    Type: Application
    Filed: February 18, 2021
    Publication date: September 9, 2021
    Inventors: Yanjun SUN, George CHERIAN, Alfred ASTERJADHI, Sai Yiu Duncan HO, Abhishek Pramod PATIL
  • Publication number: 20210282119
    Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication. An example wireless communication device broadcasts a first beacon frame over a first communication link of an access point (AP) multi-link device (MLD) (AP MLD), and broadcasts a second beacon frame over a second communication link of the AP MLD. The first beacon frame indicates transmission of group data over the first communication link, and the second beacon frame indicates transmission of the group data over the second communication link. The wireless communication device transmits the group data, concurrently over the first and second communication links, to one or more wireless stations (STAs). Another example wireless communication device obtains one or more beacon frames indicating buffered group data in an AP MLD for at least the wireless communication device, selects one or more group communication links, and obtains the group data over the one or more selected group communication links.
    Type: Application
    Filed: February 3, 2021
    Publication date: September 9, 2021
    Inventors: Alfred ASTERJADHI, George CHERIAN, Abhishek Pramod PATIL, Sai Yiu Duncan HO, Yanjun SUN
  • Publication number: 20210282186
    Abstract: This disclosure provides methods, devices and systems for transmitting and receiving physical protocol data units (PPDUs) over multiple links. In some aspects, a wireless communication device may determine that first random back off (RBO) for a first channel of a first link has counted down to zero. A wireless communication device may determine, when the first RBO has counted down to zero, that a second RBO for a second channel of a second link has a count down remaining. A wireless communication device may optionally transmit a medium reservation message on the first link reserving a transmission opportunity (TXOP). A wireless communication device may determine whether to wait for the second RBO before transmitting on the first link. A wireless communication device may transmit at least a first PPDU on the first link during the TXOP.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 9, 2021
    Inventors: George CHERIAN, Abhishek Pramod PATIL, Sai Yiu Duncan HO, Alfred ASTERJADHI, Yanjun SUN, Guido Robert FREDERIKS, Maarten Menzo WENTINK, Raja BANERJEA
  • Publication number: 20210282007
    Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication performed by a wireless communication device. An example wireless communication device includes an access point (AP) multi-link device (MLD). The AP MLD transmits a beacon frame to a wireless station (STA) MLD, the beacon frame including a plurality of AP medium access control (MAC) addresses of respective APs belonging to the AP MLD. The AP MLD receives an association request from the STA MLD, the association request including a plurality of STA MAC addresses of respective STAs belonging to the STA MLD. The AP MLD generates, during a handshake operation with the STA MLD, one or more encryption keys configured to encrypt communications between the AP MLD and the STA MLD. The AP MLD verifies the plurality of STA MAC addresses based at least in part on the one or more encryption keys.
    Type: Application
    Filed: March 2, 2021
    Publication date: September 9, 2021
    Inventors: Sai Yiu Duncan Ho, Jouni Kalevi Malinen, George Cherian, Alfred Asterjadhi, Abhishek Pramod Patil
  • Publication number: 20210266998
    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: Application
    Filed: February 17, 2021
    Publication date: August 26, 2021
    Inventors: Sai Yiu Duncan HO, Abhishek Pramod Patil, George Cherian, Alfred Asterjadhi, Yanjun Sun