US 12,225,436 B2
Sensor system, wireless cooperative receiving system, and wireless cooperative receiving method
Kenichi Matsunaga, Tokyo (JP); Takayuki Ogasawara, Tokyo (JP); and Hiroyoshi Togo, Tokyo (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Appl. No. 17/776,194
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed Nov. 18, 2019, PCT No. PCT/JP2019/045058
§ 371(c)(1), (2) Date May 11, 2022,
PCT Pub. No. WO2021/100081, PCT Pub. Date May 27, 2021.
Prior Publication US 2022/0394438 A1, Dec. 8, 2022
Int. Cl. H04W 4/38 (2018.01); H04W 4/80 (2018.01); H04W 36/00 (2009.01); H04W 88/04 (2009.01)
CPC H04W 4/38 (2018.02) [H04W 4/80 (2018.02); H04W 36/033 (2023.05); H04W 88/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A sensor system comprising:
one or more wireless sensors configured to store, in a wireless packet, sensor data that has been detected and transmit the wireless packet using Bluetooth wireless communication;
a plurality of relay terminals, each of the plurality of relay terminals configured to receive the wireless packet transmitted from the one or more wireless sensors; and
a control device connected to the plurality of relay terminals by a communication line and configured to control an operation of receiving the wireless packet in the plurality of relay terminals,
wherein each of the plurality of relay terminals is further configured to:
store the wireless packet received from the one or more wireless sensors and a reception strength of the Bluetooth wireless communication detected when the wireless packet is received in a first host controller interface (HCI) packet;
transmit the first HCI packet to the control device; and
return a response to the wireless packet to a source wireless sensor that is a source of the wireless packet only when a second HCI packet is received from the control device; and
wherein the control device is further configured to:
compare reception strengths received through first HCI packets from the plurality of relay terminals, that pertain to the wireless packet transmitted from a same wireless sensor of the one or more wireless sensors and received by each of the plurality of relay terminals;
transmit the second HCI packet to only one target relay terminal of the plurality of relay terminals having a highest reception strength among the reception strengths received through the first HCI packets; and
relay the sensor data stored in the wireless packet received by the target relay terminal to a host device.