US 12,190,699 B2
Calculation device, calculation system, calculation method, and storage medium
Hirotoshi Sakai, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 18/021,699
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Sep. 27, 2021, PCT No. PCT/JP2021/035226
§ 371(c)(1), (2) Date Feb. 16, 2023,
PCT Pub. No. WO2022/065462, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 2020-161647 (JP), filed on Sep. 28, 2020.
Prior Publication US 2023/0360510 A1, Nov. 9, 2023
Int. Cl. G08B 21/10 (2006.01); G08B 21/02 (2006.01); H04W 4/90 (2018.01)
CPC G08B 21/10 (2013.01) [G08B 21/02 (2013.01); H04W 4/90 (2018.02)] 10 Claims
OG exemplary drawing
 
1. A calculation device comprising:
a communicator configured to transmit a response request to a terminal in an evacuation shelter and receive, from the terminal responding to the response request, a signal according to an operation by a user of the terminal; and
a calculator configured to calculate, as a number of evacuees in the evacuation shelter, a number of the terminals transmitting the signal,
wherein the communicator transmits the response request a plurality of times, and
wherein, when the terminal transmitting the signal does not respond to the response request, the calculator calculates a number of evacuees without including the terminal in the number of evacuees.