公开(公告)号：US20210282184A1

公开(公告)日：2021-09-09

申请号：US17227075

申请日：2021-04-09

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： LEI HUANG ,  ROJAN CHITRAKAR ,  YOSHIO URABE ,  ISAMU YOSHII

IPC: H04W74/08 ,  H04L5/00 ,  H04W74/00 ,  H04W76/11 ,  H04W72/04

Abstract: An communication apparatus of the present disclosure comprises a receiver that receives a Trigger frame for allocating resource units (RUs) for random access and another frame including Random Access parameter element that comprises a first field indicating an OFDMA contention window (OCW) minimum value (OCWmin) and a second field indicating an OCW maximum value (OCWmax); and control circuitry that controls Uplink OFDMA-based Random Access (UORA) procedure using the OCWmin and the OCWmax.

公开(公告)号：US20200045636A1

公开(公告)日：2020-02-06

申请号：US16603574

申请日：2018-03-01

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： LEI HUANG ,  YOSHIO URABE ,  ROJAN CHITRAKAR

IPC: H04W52/02 ,  H04L12/861

Abstract: A communication apparatus of the present disclosure comprises a first receiver which, in operation, receives a downlink data frame from a base station; a decoder which, in operation, decodes data included in the received downlink data frame; a signal generator which, when the decoded data indicates that there is no buffered traffic for the communication apparatus, generates an uplink frame that includes acknowledgement information and a wake-up radio (WUR) mode request indicating a request to transit to the WUR mode from a primary connectivity radio (PCR) mode; and a transmitter which, in operation, transmits the uplink frame to the base station.

公开(公告)号：US20190200387A1

公开(公告)日：2019-06-27

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 ,  H04W48/12 ,  H04W28/20

CPC classification number: H04W74/0816 ,  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.