Patent ID: 8223710

Claim:
A terminal apparatus comprising: a communication unit operative to communicate while forming an ad hoc network with other terminal apparatuses; a reception unit operative, when being assigned a role of approving participation of a new terminal apparatus in an ad hoc network formed by the communication unit, to receive a participation request from a new terminal apparatus via the communication unit over a predetermined period after the execution of the role is requested by entering an approval mode; a processing unit operative to perform an approval process on the participation request received by the reception unit; and a notification unit operative to give notification of the result of the approval process performed by the processing unit, wherein the processing unit extends the predetermined period when the processing unit approves a new terminal apparatus, the processing unit calculates the number of new terminal apparatuses that have been approved in the predetermined period, compares a pre-set threshold value and a calculated number, and cancels the approval when the calculated number is larger than the pre-set threshold value, and the communication unit participates in the ad hoc network and performs communication after the predetermined period.