Patent ID: 8913958

Claim:
An access control method for a wireless communication system including a base station device and a first mobile station device, the base station device being assigned with identification information of a group, the base station device being configured to perform a control with a first access control method in which a mobile station device subscribing to the group is allowed to access the base station device, the first mobile station device being configured to access the base station device, the access control method comprising: a first step of a first access method changer included in the base station device changing an access control method of the base station device to a third access control method in which the control with the first access control method and a control with a second access control method are performed simultaneously, the second access method being such that any mobile station device including the first mobile station device and a second mobile station device different from the first mobile station device is allowed to access the base station device, the first step being made based on a subscribing device addition request, the subscribing device addition request being transmitted from the second mobile station device subscribing to the group having the identification information of the group assigned to the base station device, the subscribing device addition request requesting the base station device to offer a membership to the group to the first mobile station device; a second step of an identification information updating unit included in the first mobile station device storing, in the first mobile station device, the identification information of the group assigned to the base station device having changed the access control method to the third access control method in the first step; and a third step of a second access method changer included in the base station device changing the access control method of the base station device from the third access control method changed in the first step to the first access control method, the third step being made based on a completion report, the completion report being transmitted from the first mobile station device, the completion report notifying the base station device of completion of storing, in the first mobile station device, the identification information of the group.