US 12,170,601 B2
Network management device, network management system and network management method
Koji Sasaki, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Sep. 6, 2023, as Appl. No. 18/242,861.
Application 18/242,861 is a continuation of application No. 17/559,209, filed on Dec. 22, 2021, granted, now 11,784,902.
Application 17/559,209 is a continuation of application No. PCT/JP2020/022944, filed on Jun. 11, 2020.
Claims priority of application No. 2019-128223 (JP), filed on Jul. 10, 2019.
Prior Publication US 2023/0421470 A1, Dec. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 12/00 (2006.01); H04L 43/0817 (2022.01); H04L 43/0823 (2022.01); H04L 43/0864 (2022.01); H04L 43/0888 (2022.01)
CPC H04L 43/0817 (2013.01) [H04L 43/0823 (2013.01); H04L 43/0864 (2013.01); H04L 43/0888 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A network management device that divides a plurality of terminal devices connected to a network into a plurality of groups, transmits transmission data to the plurality of terminal devices, and receives response data corresponding to the transmission data to acquire connection states of the plurality of terminal devices, the network management device comprising at least one of:
an individual error determiner configured to determine that an individual error occurs in a target terminal device belonging to a group among the plurality of groups when a difference between (i) a response time from a transmission time of the transmission data to a reception time of the response data for the target terminal device and (ii) a first reference time is larger than a first predetermined value; and
a group error determiner configured to determine that a group error occurs in a target group to which two or more terminal devices belongs among the plurality of groups when a difference between (i) a current average response time that is an average value of the response time for each of the two or more terminal devices and (ii) a second reference time is larger than a second predetermined value.