公开(公告)号：US11637585B2

公开(公告)日：2023-04-25

申请号：US17356792

申请日：2021-06-24

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Robert Liang ,  Jyothsna Kunduru ,  Kwang Seop Eom

IPC: H04W4/00 ,  H04B1/7156 ,  H04W4/80 ,  H04W52/02

Abstract: A radio communications device includes a RTC configured to run even during sleep for receiving from a coordinator node (CN) in an asynchronous channel hopping WPAN an asynchronous hopping sequence (AHS) frame that includes the CN's hopping sequence. A processor implements a stored sleepy device operation in asynchronous channel hopping networks algorithm. The algorithm is for determining a time stamp for the AHS frame and the CN's initial timing position within the hopping sequence, storing the time stamp, going to sleep and upon waking up changing a frequency band of its receive (Rx) channel to an updated fixed channel. A data request command frame is transmitted by the device on the CN's listening channel that is calculated from the CN's hopping sequence, time stamp, CN's initial timing position and current time, and the device receives an ACK frame transmitted by the CN at the updated fixed channel of Rx operation.

公开(公告)号：US11082086B2

公开(公告)日：2021-08-03

申请号：US16576345

申请日：2019-09-19

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Robert Liang ,  Jyothsna Kunduru ,  Kwang Seop Eom

IPC: H04W4/00 ,  H04B1/7156 ,  H04W4/80 ,  H04W52/02

Abstract: A radio communications device includes a RTC configured to run even during sleep for receiving from a coordinator node (CN) in an asynchronous channel hopping WPAN an asynchronous hopping sequence (AHS) frame that includes the CN's hopping sequence. A processor implements a stored sleepy device operation in asynchronous channel hopping networks algorithm. The algorithm is for determining a time stamp for the AHS frame and the CN's initial timing position within the hopping sequence, storing the time stamp, going to sleep and upon waking up changing a frequency band of its receive (Rx) channel to an updated fixed channel. A data request command frame is transmitted by the device on the CN's listening channel that is calculated from the CN's hopping sequence, time stamp, CN's initial timing position and current time, and the device receives an ACK frame transmitted by the CN at the updated fixed channel of Rx operation.

公开(公告)号：US20200014422A1

公开(公告)日：2020-01-09

申请号：US16576345

申请日：2019-09-19

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Robert Liang ,  Jyothsna Kunduru ,  Kwang Seop Eom

IPC: H04B1/7156 ,  H04W52/02

Abstract: A radio communications device includes a RTC configured to run even during sleep for receiving from a coordinator node (CN) in an asynchronous channel hopping WPAN an asynchronous hopping sequence (AHS) frame that includes the CN's hopping sequence. A processor implements a stored sleepy device operation in asynchronous channel hopping networks algorithm. The algorithm is for determining a time stamp for the AHS frame and the CN's initial timing position within the hopping sequence, storing the time stamp, going to sleep and upon waking up changing a frequency band of its receive (Rx) channel to an updated fixed channel. A data request command frame is transmitted by the device on the CN's listening channel that is calculated from the CN's hopping sequence, time stamp, CN's initial timing position and current time, and the device receives an ACK frame transmitted by the CN at the updated fixed channel of Rx operation.

公开(公告)号：US12003271B2

公开(公告)日：2024-06-04

申请号：US18185609

申请日：2023-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Robert Liang ,  Jyothsna Kunduru ,  Kwang Seop Eom

IPC: H04W4/00 ,  H04B1/7156 ,  H04W4/80 ,  H04W52/00 ,  H04W52/02

CPC classification number: H04B1/7156 ,  H04W4/80 ,  H04W52/0235 ,  H04W52/0274 ,  H04B2001/71563 ,  H04B2201/71338 ,  Y02D30/70

Abstract: A radio communications device includes a RTC configured to run even during sleep for receiving from a coordinator node (CN) in an asynchronous channel hopping WPAN an asynchronous hopping sequence (AHS) frame that includes the CN's hopping sequence. A processor implements a stored sleepy device operation in asynchronous channel hopping networks algorithm. The algorithm is for determining a time stamp for the AHS frame and the CN's initial timing position within the hopping sequence, storing the time stamp, going to sleep and upon waking up changing a frequency band of its receive (Rx) channel to an updated fixed channel. A data request command frame is transmitted by the device on the CN's listening channel that is calculated from the CN's hopping sequence, time stamp, CN's initial timing position and current time, and the device receives an ACK frame transmitted by the CN at the updated fixed channel of Rx operation.