Patents by Inventor Rojan CHITRAKAR

Rojan CHITRAKAR 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: 20240163799
    Abstract: A method of the present disclosure performed by a first communication device comprises determining wake-up operating parameters and entering WUR (wake-up radio) mode by communicating with a second communication device; wherein one of wake-up operating parameters is duty cycle schedule of WUR receiver of the first communication device; and the starting point of the duty cycle schedule of WUR receiver of the first communication device is aligned with TWBTT (target WUR Beacon transmission time).
    Type: Application
    Filed: January 26, 2024
    Publication date: May 16, 2024
    Inventors: Lei HUANG, Yoshio URABE, Rojan CHITRAKAR
  • Publication number: 20240162945
    Abstract: The present disclosure provides communication apparatus and communication method for channel estimation. The communication apparatus comprises a transmitter, which in operation, transmits a physical layer protocol data unit (PPDU) to one or more other communication apparatus in a multiple-input multiple-output (MIMO) wireless network, the PPDU including a long training field (LTF) that facilitates the one or more other communication apparatus to estimate respective channels for respective communications with the communication apparatus; and a controller, which in operation, establishes the number of LTF symbols (NLTF) for generating the LTF in the PPDU, wherein the NLTF depends on a maximum value (NSTSMAX) of the number of space-time streams for each resource unit (RU) in the PPDU.
    Type: Application
    Filed: December 19, 2023
    Publication date: May 16, 2024
    Inventors: Lei HUANG, Yoshio URABE, Rojan CHITRAKAR
  • Patent number: 11984960
    Abstract: A communication apparatus of the present disclosure includes a receiver which, in operation, receives a signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and one of the two or more frequency diversity transmission schemes is applied based on a value of the Nss; and circuitry which, in operation, decodes the signal.
    Type: Grant
    Filed: January 27, 2023
    Date of Patent: May 14, 2024
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Lei Huang, Yoshio Urabe, Rojan Chitrakar
  • Publication number: 20240155697
    Abstract: Apparatuses and methods for providing multiple structures and methods to enable enhanced random access of access point (AP) controlled resources in a wireless local area network (WLAN) to reduce collisions and increase throughput and efficiency, particularly in high density WLAN environments are provided. The techniques disclosed here feature a communication apparatus including a transceiver and circuitry. The transceiver, in operation, receives signals from and transmits signals to at least one access point in a wireless local area network (WLAN).
    Type: Application
    Filed: December 23, 2021
    Publication date: May 9, 2024
    Inventors: Yanyi DING, Rojan CHITRAKAR, Yoshio URABE
  • Patent number: 11979827
    Abstract: A multi-band communication device includes: one or more transceiver circuitries, each of which in operation transmits and receives data on a plurality of channels in different frequency bands; and a band configuration circuitry operative to change a configuration of any one of the transceiver circuitries based on configuration information received from a multi-band Access Point (AP). The configuration information specifies one of the frequency bands as a Primary band and the other frequency bands as Secondary band(s). The transceiver circuitry operating on the Primary band is used as a default circuitry for communication with the AP.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: May 7, 2024
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Rojan Chitrakar, Lei Huang, Yoshio Urabe
  • Publication number: 20240146507
    Abstract: A transmitting multi-link device (MLD) includes circuitry and a transmitter. The circuitry, in operation, constructs an Additional Authentication Data (AAD) and a Nonce, and encapsulates a plaintext medium access control (MAC) protocol data unit (MPDU), the AAD, and the Nonce to generate an encapsulated MPDU. The AAD includes an Address 1 (A1) field, to which a recipient MLD's MAC address is set, and an AAD Address 2 (A2) field, to which the transmitting MLD's MAC address is set. The Nonce includes a Nonce Address 2 (A2) field, to which the transmitting MLD's MAC address is set. The transmitter, in operation, transmits the encapsulated MPDU to the recipient MLD on a first link.
    Type: Application
    Filed: November 28, 2023
    Publication date: May 2, 2024
    Inventors: Rojan CHITRAKAR, Lei HUANG, Yoshio URABE
  • Patent number: 11974330
    Abstract: The present disclosure relates to the prioritization of devices taking part in a multi-user random access wireless communication. Based on some known conditions, devices that comply with the conditions are given preferential treatment during the random access period. The preferential treatment may refer to the eligible devices being allowed to access more resource units during the random access, or it may also mean faster access to the medium during the random access. By taking advantage of the methods described in the present disclosure, it is possible to assign higher priority to selected frame types and/or device categories in a multi-user random access wireless communication system.
    Type: Grant
    Filed: May 31, 2023
    Date of Patent: April 30, 2024
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Rojan Chitrakar, Yoshio Urabe, Lei Huang, Michael Hong Cheng Sim
  • Publication number: 20240129271
    Abstract: The present disclosure provides communication apparatuses and methods for multi-link address resolution, the communication apparatus being a communication apparatus of a plurality of communication apparatuses affiliated with a first multi-link device (MLD) comprising: a receiver, which in operation, receives, from a requesting communication apparatus, a first data frame carrying an address resolution request, the address resolution request carrying an internet protocol address of the first MLD; circuitry, which in operation, determines whether or not the requesting communication apparatus is affiliated with a second MLD; and generates a second data frame carrying an address resolution response, the address resolution response carrying a media access control (MAC) address of the communication apparatus in response to determining that the requesting communication apparatus is not affiliated with the second MLD, or a MLD MAC address of the first MLD in response to determining that the requesting communication ap
    Type: Application
    Filed: December 6, 2021
    Publication date: April 18, 2024
    Inventors: Rojan CHITRAKAR, Yoshio URABE
  • Publication number: 20240121143
    Abstract: The present disclosure provides communication apparatus and communication method for channel estimation. The communication apparatus comprises circuitry, which, in operation, generates a signal comprising one or more non-legacy long training field (LTF) symbols, each of the one or more non-legacy LTF symbols comprising a plurality of data tones and a plurality of pilot tones, maps a non-legacy LTF sequence to the plurality of data tones and the plurality of pilot tones, and groups the plurality of data tones with nonzero non-legacy LTF sequence values into a first tone group and a second tone group; and a transmitter which, in operation, transmits the generated signal.
    Type: Application
    Filed: August 4, 2020
    Publication date: April 11, 2024
    Inventors: Lei HUANG, Yoshio URABE, Yanyi DING, Rojan CHITRAKAR
  • Publication number: 20240097881
    Abstract: A transmitting multi-link device (MLD) includes circuitry and a transmitter. The circuitry, in operation, constructs an Additional Authentication Data (AAD) and a Nonce, and encapsulates a plaintext medium access control (MAC) protocol data unit (MPDU), the AAD, and the Nonce to generate an encapsulated MPDU. The AAD includes an Address 1 (A1) field, to which a recipient MLD's MAC address is set, and an AAD Address 2 (A2) field, to which the transmitting MLD's MAC address is set. The Nonce includes a Nonce Address 2 (A2) field, to which the transmitting MLD's MAC address is set. The transmitter, in operation, transmits the encapsulated MPDU to the recipient MLD on a first link.
    Type: Application
    Filed: November 28, 2023
    Publication date: March 21, 2024
    Inventors: Rojan CHITRAKAR, Lei HUANG, Yoshio URABE
  • Publication number: 20240097859
    Abstract: Communication devices and methods for Multi-AP synchronous transmission are provided. One exemplary embodiment provides a communication apparatus comprising: circuitry, which in operation, generates a frame comprising information of a subsequent transmission; and a transmitter, which in operation, transmits the frame to another communication apparatus.
    Type: Application
    Filed: December 6, 2021
    Publication date: March 21, 2024
    Inventors: Yanyi DING, Rojan CHITRAKAR, Hong Cheng, Michael SIM, Yoshio URABE
  • Publication number: 20240098712
    Abstract: Communication devices and methods for Coordinated Service Periods (SPs) are provided. The first aspect provides a first Access Point (AP) comprising: circuitry, which in operation, generates a request frame indicating a request to setup one or more Coordinated SPs; and a transmitter, which in operation, transmits the request frame to a second AP. The second aspect provides a non-AP STA comprising: a receiver receives a Beacon frame or an Action frame from its associated AP, circuitry extracts information of coordinated SPs from the frame and a transmitter, transmits a request frame to the AP indicating a request to join the SPs.
    Type: Application
    Filed: March 10, 2021
    Publication date: March 21, 2024
    Inventors: Rojan CHITRAKAR, Yoshio URABE, Yanyi DING
  • Patent number: 11924761
    Abstract: A method of the present disclosure performed by a first communication device comprises determining wake-up operating parameters and entering WUR (wake-up radio) mode by communicating with a second communication device; wherein one of wake-up operating parameters is duty cycle schedule of WUR receiver of the first communication device; and the starting point of the duty cycle schedule of WUR receiver of the first communication device is aligned with TWBTT (target WUR Beacon transmission time).
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: March 5, 2024
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Lei Huang, Yoshio Urabe, Rojan Chitrakar
  • Patent number: 11916714
    Abstract: The present disclosure provides communication apparatus and communication method for control signaling. The communication apparatus comprises circuitry, which, in operation, generates a transmission signal comprising a first signal field which comprises a first part and a second part, each comprising an equal number of data bits, wherein the data bits of the second part of the first signal field does not comprise version independent bits; and a transmitter, which, in operation, transmit the generated transmission signal.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: February 27, 2024
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Lei Huang, Yoshio Urabe, Rojan Chitrakar
  • Publication number: 20240056127
    Abstract: An access point (AP) includes circuitry, which, in operation, generates a frame that includes joint transmission (JT) data and a JT identity that uniquely identifies the JT data. The access point further includes a transmitter, which, in operation, transmits the frame to one or more APs that jointly transmit the JT data to a communication apparatus.
    Type: Application
    Filed: September 19, 2023
    Publication date: February 15, 2024
    Inventors: Rojan CHITRAKAR, Lei HUANG, Yoshio URABE
  • Patent number: 11894893
    Abstract: The present disclosure provides communication apparatus and communication method for channel estimation. The communication apparatus comprises a transmitter, which in operation, transmits a physical layer protocol data unit (PPDU) to one or more other communication apparatus in a multiple-input multiple-output (MIMO) wireless network, the PPDU including a long training field (LTF) that facilitates the one or more other communication apparatus to estimate respective channels for respective communications with the communication apparatus; and a controller, which in operation, establishes the number of LTF symbols (NLTF) for generating the LTF in the PPDU, wherein the NLTF depends on a maximum value (NSTSMAX) of the number of space-time streams for each resource unit (RU) in the PPDU.
    Type: Grant
    Filed: December 19, 2022
    Date of Patent: February 6, 2024
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Lei Huang, Yoshio Urabe, Rojan Chitrakar
  • Publication number: 20240040639
    Abstract: The present disclosure provides communication apparatuses and methods for multi-link peer-to-peer communication, the communication apparatus being a communication apparatus of a plurality of communication apparatuses affiliated with a first multi-link device (MLD), each of the plurality of communication apparatuses operating in a corresponding link of the first MLD, the communication apparatus comprising: circuitry, which in operation, generates a request frame, the request frame being one of a discovery request frame to discover a peer-to-peer communication capability of another communication apparatus, or a setup request frame to request setup of one or more direct links, the request frame carrying a multi-link (ML) indication identifying that the communication apparatus is affiliated with the first MLD; and a transmitter, which in operation, transmits the request frame in a link.
    Type: Application
    Filed: March 10, 2021
    Publication date: February 1, 2024
    Inventors: Rojan CHITRAKAR, Yoshio URABE, Rajat PUSHKARNA
  • Publication number: 20240032089
    Abstract: The present disclosure provides a communication apparatus and a communication method for prioritized traffic. The communication apparatus, comprising: a receiver, which, in operation, receives from another communication apparatus a notification of one or more priority service periods (SPs), each SP being a time period in which only frames belonging to a traffic type designated by the other communication apparatus are allowed to be transmitted; and circuitry, which, in operation, determines if at least one frame of the designated traffic type is to be transmitted in one of the one or more SPs, and refrains from transmitting during the one of the one of more SPs in response to the determination that there are no frames of the designated traffic type to be transmitted.
    Type: Application
    Filed: October 21, 2021
    Publication date: January 25, 2024
    Inventors: Rojan CHITRAKAR, Yoshio URABE
  • Patent number: 11882065
    Abstract: A transmission apparatus includes a transmitter and a receiver. The transmitter transmits a Trigger Frame for allocating resources for Uplink Multi User (UL MU) transmission, the Trigger Frame comprising a common information field that includes a type subfield indicating one of a plurality of trigger types, wherein the plurality of trigger types includes a first trigger type, a second trigger type and a third trigger type, the first trigger type indicating a basic trigger, the second trigger type indicating multi-user block ack request, and the third trigger type indicating a specific trigger used for soliciting a specific type of UL MU response frame from a plurality of terminal stations. The receiver, responsive to the type subfield indicating the third trigger type, receives the specific type of UL MU response frame from the plurality of terminal station.
    Type: Grant
    Filed: August 24, 2022
    Date of Patent: January 23, 2024
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Rojan Chitrakar, Lei Huang, Yoshio Urabe
  • Patent number: 11870885
    Abstract: A transmitting multi-link device (MLD) includes circuitry and a transmitter. The circuitry, in operation, constructs an Additional Authentication Data (AAD) and a Nonce, and encapsulates a plaintext medium access control (MAC) protocol data unit (MPDU), the AAD, and the Nonce to generate an encapsulated MPDU. The AAD includes an Address 1 (A1) field, to which a recipient MLD's MAC address is set, and an AAD Address 2 (A2) field, to which the transmitting MLD's MAC address is set. The Nonce includes a Nonce Address 2 (A2) field, to which the transmitting MLD's MAC address is set. The transmitter, in operation, transmits the encapsulated MPDU to the recipient MLD on a first link.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: January 9, 2024
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Rojan Chitrakar, Lei Huang, Yoshio Urabe