| 摘要 |
When an access control apparatus 1 receives an update request for session information of a user terminal 3, the access control apparatus having received the update request identifies multiple access control apparatuses storing therein the session information of the user terminal 3 on the basis of an identifier of the user terminal. Further, the access control apparatus 1 having received the update request sends a new update request for the session information of the user terminal 3 to each of the multiple identified access control apparatuses. Each of the access control apparatuses having received the new update request updates a session-data storage part of the access control apparatus having received the new update request in association with an update time. |
