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    Communication apparatus and communication method for multi-band random access
    1.
    发明授权
    Communication apparatus and communication method for multi-band random access 有权

    公开(公告)号：US12120753B2

    公开(公告)日：2024-10-15

    申请号：US17293864

    申请日：2019-10-30

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Lei Huang ,  Yoshio Urabe ,  Rojan Chitrakar

    IPC: H04W74/0833 ,  H04W72/0446 ,  H04W72/0453

    CPC classification number: H04W74/085 ,  H04W72/0446 ,  H04W72/0453

    Abstract: A station apparatus includes a receiver and a controller. The receiver, in operation, receives a Trigger frame allocating Random Access Resource Units (RA-RUs) over multiple bands. The Trigger frame includes a User Info field that comprises a Band Indication subfield for specifying a first band among the multiple bands, an RU Allocation subfield for indicating a first RA-RU of one or more contiguous RA-RUs in the first band, and a Number of RA-RU subfield for indicating a number of the contiguous RA-RUs minus one in the first band. The controller, in operation: sets a first Orthogonal Frequency Division Multiple Access (OFDMA) random access backoff (OBO) counter to 0 if an initial value of the first OBO counter is not larger than a number of eligible RA-RUs in the first band, which is a subset of contiguous RA-RUs in the Trigger frame; and randomly selects one of the eligible RA-RUs.

    Transmission apparatus and transmission method
    6.
    发明授权
    Transmission apparatus and transmission method 有权

    公开(公告)号：US11743002B2

    公开(公告)日：2023-08-29

    申请号：US17543455

    申请日：2021-12-06

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Rojan Chitrakar ,  Lei Huang ,  Yoshio Urabe

    IPC: H04L5/00 ,  H04B7/0452 ,  H04W84/12 ,  H04L1/1867

    CPC classification number: H04L5/0037 ,  H04B7/0452 ,  H04L1/188 ,  H04L5/0023 ,  H04L5/0055 ,  H04W84/12

    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.

    Communication apparatus and communication method
    7.
    发明授权
    Communication apparatus and communication method 有权

    公开(公告)号：US11533755B2

    公开(公告)日：2022-12-20

    申请号：US16285965

    申请日：2019-02-26

    Applicant: Panasonic Intellectual Property Corporation of America

    Inventor： Rojan Chitrakar ,  Lei Huang ,  Yoshio Urabe

    IPC: H04W74/08 ,  H04W28/20 ,  H04W48/12 ,  H04W84/12

    Abstract: The communication apparatus comprises a receiver which, in operation, receives a PHY layer Data Unit that includes a duration field; Physical (PHY) layer circuitry which, in operation, issues a PHY-CCA (clear channel assessment) primitive parameter indicating bandwidth information on a busy or idle state for each subchannel within an operating bandwidth; and Media Access Control (MAC) circuitry which, in operation, updates a Network Allocation Vector (NAV) value based on the duration information and, in operation, determines busy/idle state of at least one subchannel, wherein the MAC circuitry, in operation, controls transmission of the HE TB PHY layer Data Unit based on the updated NAV value and the busy/idle state of the at least one subchannel, and controls the PHY circuitry to have the HE TB PHY layer Data Unit transmitted when the at least one subchannel is considered idle, regardless of whether the primary subchannel is busy or not.

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