Patents by Inventor Yongho Seok

Yongho Seok 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: 10694407
    Abstract: Embodiments of the present invention provide secure ranging measurements for wireless devices in multi-user (MU) mode. Specifically, a signaling procedure between an initiating wireless station (ISTA) and a responding wireless station (RSTA) is used to enable protection of randomized LTF sequences used in the secure ranging measurements. The signaling procedure may be performed in a HEz or VHTz mode and may include performing error recovery when operating in the HEz mode.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: June 23, 2020
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Yongho Seok, Chao-Chun Wang, James Yee
  • Patent number: 10687321
    Abstract: Presented systems and methods facilitate efficient and effective communication link adaptation. In one embodiment, a system comprises: a first communication device configured to forward link adaptation information, and a second communication component configured to receive the link adaptation information. The system is part of a wireless local area network (WLAN). The link adaptation information can include Modulation and Coding Scheme (MCS) Feed Back (MFB) related information in a communication frame. The communication frame can include a first field and a second field. The first field indicates the information is being forwarded as unsolicited MFB information or is associated with a solicitation request for the MFB information. The second first field indicates whether the information is MFB information or a request for MFB information.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: June 16, 2020
    Assignee: MEDIATEK INC.
    Inventors: Chien-Fang Hsu, Yongho Seok, Chih-Shi Yee
  • Patent number: 10667237
    Abstract: A method of determining a distance between mobile wireless devices can include determining a format and bandwidth supported by an initiating Station (STA) and a responding Station (STA) and exchanging one or more sets of Null Data Packet (NDP) frames between the initiating Station (STA) and the responding Station (STA) using the determined format and bandwidth. The distance between the initiating Station (STA) and the responding Station (STA) can then be determined based on timing measurements of the one or more sets of Null Data Packet (NDP) frames exchanged between the initiating Station (STA) and the responding Station (STA).
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: May 26, 2020
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Chao-Chun Wang, Chih-Shi Yee
  • Publication number: 20200163141
    Abstract: Embodiments of the present invention provide a method and apparatus for simultaneous transmission and reception of data wirelessly using different wireless bands. The multi-link operations described herein can provide higher network throughput and improved network flexibility compared to traditional techniques to wireless communication. Link management operations such as enabling and disabling of a link may be performed by an AP or STA by sending a frame over a link that is currently active. Moreover, an AP may request a switch to a different link available on the AP side for MLO, for example, when a link is occupied by interference and is not available when AP needs to use the link, and the operating parameters of a target link can be updated.
    Type: Application
    Filed: November 15, 2019
    Publication date: May 21, 2020
    Inventors: Chien-Fang Hsu, Yongho Seok, James Chih-Shi Yee
  • Publication number: 20200120544
    Abstract: Mechanisms of CCA status reporting and NAV distribution for coordinated transmissions in a multi-AP WLAN. A coordinator AP may broadcast a RTS frame to a set of coordinated APs, which allow the coordinated APs with a CCA clear status to set a protected period in a CST frame to silence the associated non-AP STAs. The coordinator AP also polls the coordinated APs to have them individually report their CCA statuses as well as additional information used for transmission coordination. In some embodiments, a status report from a coordinated AP may integrate the protected period setting and the CCA clean status indication, and therefore the coordinator AP just needs to poll for such a report without using RTS/CTS exchange. A coordinated AP may set a protected period to end at the complete transmission of a coordination frame. The coordination frame may specify the remaining TXOP duration information.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 16, 2020
    Inventors: Jianhan LIU, Yongho SEOK, James June-Ming WANG, James Chih-Shi YEE, Thomas Edward PARE, JR.
  • Publication number: 20200120603
    Abstract: Power management operations are performed by devices communicating using multiple bands simultaneously where a first wireless band can be used to send and receive power management control frames for use on a second wireless band of a wireless network. In this way, a device that is in a sleep or dose power management state on a first band can be instructed to enter an awake power management state on the first band based on a communication received over a second band that is currently active and receiving data. Embodiments of the present invention enable power to be conserved when a band is not currently being used, or when there is no more data available (buffered) for a specific band.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 16, 2020
    Inventors: Yongho Seok, Jianhan Liu, Gabor Bajko, James Chih-Shi Yee
  • Publication number: 20200112878
    Abstract: Embodiments of the present invention provide a method and apparatus for enhanced data retransmission based on log-likelihood ratio (LLR) combining in WLAN. According to some embodiments, packets can be retransmitted using a modified transmission scheme. Packets that are received with an error are stored, and a subsequent packet is received that includes data that can be used to correct the error. For example, each packet can be encoded for both error detection and correction, and the retransmission mechanism can be adapted to the error rate. The retransmission scheme is improved by utilizing an LLR combining scheme, transmit diversity, and modified ACK methods.
    Type: Application
    Filed: September 13, 2019
    Publication date: April 9, 2020
    Inventors: Jianhan LIU, Yongho SEOK, Chung-Ta KU, Thomas Edward PARE, JR.
  • Publication number: 20200077417
    Abstract: System and method of cooperative multi-band wireless STA communication that enables full duplex operations. Frames are configured to carry band information and are selected to be transmitted simultaneously in multiple bands based on various constraints to avoid out-of-order delivery. For frames under a block ACK agreement, a transmit STA can specify the transmission bands for the frames in an ADDBA request frame. While a first band is transmitting a first frame under a block ACK agreement, the second band can be used to transmit a frame under the same block ACK agreement as, and from the same traffic flow with, the first frame. Otherwise, the second band can only be used to transmit a frame with a different TID than the first frame.
    Type: Application
    Filed: August 27, 2019
    Publication date: March 5, 2020
    Inventors: Yongho SEOK, Jianhan LIU, Gabor BAJKO, James Chih-Shi YEE
  • Publication number: 20200053773
    Abstract: Embodiments of the present invention provide a method and apparatus for simultaneous transmission and reception of data wirelessly using different wireless bands. The multi-link operations described herein can provide higher network throughput and improved network flexibility compared to traditional techniques to wireless communication. Embodiments of the present invention support joint or independent transmission of data over different links, and a full duplex connection can be enabled by independent multi-band operation e.g., a frequency division duplex mode.
    Type: Application
    Filed: August 6, 2019
    Publication date: February 13, 2020
    Inventors: Yongho SEOK, Jianhan LIU, Gabor BAJKO, James Chih-Shi YEE
  • Patent number: 10554287
    Abstract: A method and apparatus for performing a relay operation in a wireless LAN (WLAN) system are disclosed. A method for performing a relay operation by an entity of a wireless LAN (WLAN) system includes: transmitting a frame including information indicating whether the entity is a relay access point (AP) or a root AP to at least one station (STA), wherein, if the entity is the relay AP, the frame further includes a Medium Access Control (MAC) address of the root AP associated with the entity.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: February 4, 2020
    Assignee: LG Electronics Inc.
    Inventor: Yongho Seok
  • Publication number: 20200037152
    Abstract: An encryption mechanism used on cooperative multi-band wireless STA architecture that enables full duplex operations. In encrypting a frame, an AAD can be constructed by using a selected MAC address, which may not be associated with a band to be used for transmitting the frame in an upcoming TXOP. An STA that supports simultaneous transmission in a multi-band operation uses the same MAC address to encrypt the frames to be transmitted on different bands. An AAD is constructed by using a same MAC address corresponding to one of the transceivers. A transmit STA may specify band information used for encryption in the MAC header, which serves to signal the receive STA to decrypt the frame by using the proper information.
    Type: Application
    Filed: July 24, 2019
    Publication date: January 30, 2020
    Inventors: Yongho SEOK, Jianhan Liu, James Chih-Shi Yee, Gabor Bajko
  • Publication number: 20200037342
    Abstract: System and method of wireless communication that enables determination of a proper channel bandwidth for an HT PPDU without requiring an earlier negotiation process. Assuming a TXOP does not involve any non-HT transmission, in case that TXOP duration information is specified in a first field in a previously transmitted HE PPDU in the same TXOP, the transmission opportunity (TXOP) holder utilizes the channel bandwidth specified in the initial HE PPDU of the same TXOP to determine the channel bandwidth for the subsequent PPDU. In the case that each previously transmitted PPDU has a value indicating duration unspecified in the first field, the TXOP holder determines the channel bandwidth for a subsequent PPDU based on the bandwidth specified in a preceding PPDU that has been transmitted in the same TXOP.
    Type: Application
    Filed: July 24, 2019
    Publication date: January 30, 2020
    Inventors: Yongho SEOK, Jianhan Liu, James Chih-Shi Yee
  • Publication number: 20200029362
    Abstract: An asymmetric handshaking design between an access point (AP) and a station (STA) is introduced. An access point is controlled to transmit packets in a first packet format. In response to packets transmitted from the access point in the first packet format, a station is switched to use a second packet format to transmit packets to form asymmetric handshaking with the access point when the station fails to use the first packet format to answer the access point.
    Type: Application
    Filed: July 19, 2019
    Publication date: January 23, 2020
    Inventors: Tsung-Hsuan WU, Chao-Chun WANG, Yongho SEOK, Fu-Yu TSAI
  • Patent number: 10541792
    Abstract: The present invention provides a new uplink (UL) Physical layer Protocol Data Unit (PPDU) frame format to support Multi-User Multiple Input Multiple Output (MU-MIMO) and Orthogonal Frequency Division Multiple Access (OFDMA), and methods, apparatuses, etc. therefor. In an aspect of the present invention, a method by a station (STA) for transmitting an UL PPDU frame to an Access Point (AP) simultaneously with one or more other STAs in a Wireless Local Area Network (WLAN) may include receiving a frame including a parameter for the PPDU frame from the AP; and participating in UL MU PPDU frame transmission based on the parameter.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: January 21, 2020
    Assignee: NEWRACOM, INC.
    Inventor: Yongho Seok
  • Patent number: 10542526
    Abstract: Methods and apparatus for processing Physical layer Protocol Data Unit (PPDU) based on Basic Service Set (BSS) identification information in a High Efficiency WLAN (HEW) are described. An embodiment is a method for processing a PPDU by a station (STA) in a wireless local area network. The method may include determining whether the PPDU is transmitted from a different Basic Service Set (BSS) from a BSS to which the STA belongs or a same BSS as the BSS to which the STA belongs; and processing the PPDU using a first type of Clear Channel Assessment (CCA) threshold when the PPDU is determined to be transmitted from the different BSS, wherein the first type of CCA threshold is greater than a second type of CCA threshold which is used when the PPDU is determined to be transmitted from the same BSS.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: January 21, 2020
    Assignee: NEWRACOM, INC.
    Inventor: Yongho Seok
  • Patent number: 10516519
    Abstract: The present disclosure relates to a method and apparatus for transmitting a response frame based on a type in a High Efficiency Wireless Local Area Network (WLAN) (HEW). According to an aspect, a method for transmitting an uplink frame by a station (STA) to an access point (AP) in a WLAN may be provided. The method may include receiving, from the AP, a downlink frame including information related to a type of the uplink frame, the type of the uplink frame including a single-user (SU) type and a multiple-user (MU) type; and transmitting, to the AP, the uplink frame having a type determined based on the information related to the type of the uplink frame, wherein, when the type of the uplink frame corresponds to the MU type, the uplink frame is simultaneously transmitted by a plurality of STAs including the STA and at least one other STA.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: December 24, 2019
    Assignee: NEWRACOM, INC.
    Inventor: Yongho Seok
  • Publication number: 20190342916
    Abstract: A cooperative multi-band wireless station architecture that enables full duplex operations of wireless stations (STAs). Such an STA includes a WIFI transceiver and one or more additional transceivers. The two transceivers (and the associated channels) operate in mutually exclusive WIFI bands or different types of protocols and therefore can transmit and/or receive simultaneously without signal interference to each other. The multiple transceivers can perform independent clear channel assessment (CCA) and then simultaneously perform signal transmission or reception jointly or independently. In a cooperative multi-band operation, one channel may be used as an independent assistant channel and responsible for supplying assistant information relevant to a transmission opportunity (TXOP) for the other channel (primary channel) to take corresponding actions.
    Type: Application
    Filed: May 1, 2019
    Publication date: November 7, 2019
    Inventors: Jianhan Liu, Yongho Seok, Chao-Chun Wang, James June-Ming Wang, James Chih-Shi Yee, Thomas Edward PARE, JR., Yungping Hsu
  • Patent number: 10470175
    Abstract: The invention relates to a method for efficiently configuring a mesh network in a white space band and to a device therefor. In order to configure a mesh network in a white space band, a first station, which is accessible to a geographical position database through direct Internet access, notifies at least one second station through a gate announcement frame, for which the first station itself serves as a mesh gate; at least one second station receives a first multi-hop management action frame including position information on each of at least one, mesh point that subscribes to a mesh network; and a second multi-hop management action frame including information on an available channel in the white space is transmitted to at least one mesh point. Therefore, a mesh network may be configured in a white space band.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: November 5, 2019
    Assignee: LG Electronics Inc.
    Inventors: Eunsun Kim, Yongho Seok
  • Publication number: 20190334817
    Abstract: A method by an access point in a wireless local area network to solicit an immediate acknowledgement from a station in the wireless local area network. The method includes generating and transmitting a downlink multi-user physical layer protocol data unit that includes a frame for which the access point solicits an immediate response from the station in an uplink multi-user transmission, wherein an ACK Policy field of the frame is set to a binary value of ‘01’ to indicate that the station is to provide an immediate acknowledgement for the frame to the access point if the station receives trigger information included in the downlink multi-user physical layer protocol data unit and the station is not to provide an immediate acknowledgement for the frame if the station does not receive trigger information included in the downlink multi-user physical layer protocol data unit.
    Type: Application
    Filed: July 10, 2019
    Publication date: October 31, 2019
    Inventor: Yongho SEOK
  • Patent number: 10448378
    Abstract: The present disclosure relates to a sounding procedure including uplink multi-user transmission in a High Efficiency WLAN (HEW). According to one aspect of the present disclosure, a method for transmitting a response frame by a responding Station (STA) to a transmitting STA in a wireless local area network may be provided. The method may include receiving, from the transmitting STA, a trigger frame including information related to a Modulation and Coding Scheme (MCS) for the response frame, and transmitting, to the transmitting STA, the response frame according to an MCS determined based on the information related to the MCS for the response frame included in the trigger frame. When a type of the response frame corresponds to a Multiple-User (MU) type, a same MCS may be applied to the response frame by a plurality of STAs including the STA and at least one other STA.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: October 15, 2019
    Assignee: NEWRACOM, INC.
    Inventor: Yongho Seok