Policy control system, PCRF entity, policy control method, and non-transitory computer readable medium

A policy control system including a first hardware, including a processor and a memory, and a second hardware, including a processor and a memory, the policy control system comprising:

• a policy control unit implemented at least by the first hardware and configured to determine a policy to be applied to a group including a plurality of wireless terminals according to environmental information changed at a specified timing;
• and
• a policy control execution unit implemented at least by the second hardware and configured to apply the policy determined by the policy control unit to communication related to the plurality of wireless terminals included in the group, wherein the policy control unit comprises a policy database configured to manage information about the group, the environmental information, and information about the policy to be applied to the group in association with one another and when the policy control unit receives a policy notification request message including identification information of a wireless terminal transmitted from the policy control execution unit, the policy control unit identifies the group to which the wireless terminal belongs and the environmental information, searches the policy database using the identified group and the environmental information, and determines the policy to be applied to the group to which the wireless terminal belongs.