公开(公告)号：US11051261B2

公开(公告)日：2021-06-29

申请号：US16574100

申请日：2019-09-18

Applicant: Realtek Semiconductor Corp.

Inventor： Zaiqiang Sun

IPC: H04W56/00 ,  H04W76/11 ,  H04W4/80 ,  H04W84/18

Abstract: A wireless mesh network includes multiple nodes each implemented with mesh and NB-IoT technologies. Each node performs time synchronization based on an SFN and an H-SFN of a base NB-IoT cell, wherein at least one of the multiple nodes is located in the base NB-IoT cell.

公开(公告)号：US11166138B2

公开(公告)日：2021-11-02

申请号：US16777891

申请日：2020-01-31

Applicant: Realtek Semiconductor Corp.

Inventor： Zaiqiang Sun ,  Shimeng Zou

IPC: H04W4/00 ,  H04W4/80 ,  H04W56/00 ,  H04L1/16 ,  H04W84/18

Abstract: A wireless mesh network includes multiple low-power nodes. When functioning as a data receiving node or a data relay node, each low-power node is used to monitor data transmission at intervals. Each node performs time synchronization based on an SFN and an H-SFN of a base NB-IoT cell. At least one of the multiple low-power nodes is located in the base NB-IoT cell.

公开(公告)号：US11202256B2

公开(公告)日：2021-12-14

申请号：US16747542

申请日：2020-01-21

Applicant: Realtek Semiconductor Corp.

Inventor： Zaiqiang Sun ,  Shimeng Zou

IPC: H04W52/02 ,  H04W72/04 ,  H04W84/18

Abstract: A wireless MESH network includes multiple low-power nodes. When serving as a data receiving node or a data relay node, each low-power node is configured to listen to data transmission at intervals.

公开(公告)号：US10930137B2

公开(公告)日：2021-02-23

申请号：US16748808

申请日：2020-01-22

Applicant: Realtek Semiconductor Corp.

Inventor： Zaiqiang Sun

IPC: G08B25/10 ,  G08B25/00 ,  G16Y40/10 ,  G16Y40/50

Abstract: An event alarm device includes a sensor, a notification unit, a MESH communication unit, an NB-IoT communication unit, and an MCU. The NB-IoT communication unit is configured to upload the data measured by the sensor. The MCU is configured to detect a specific event according to the data measured by the sensor. When detecting the specific event, the MCU is configured to instruct the notification unit to emit an on-site alarm, instruct the NB-IoT communication unit to send a first warning signal, and instruct the MESH communication unit to send a second warning signal.