Patent ID: 8660098

Claim:
A wireless communication method in which a plurality of wireless terminal devices are connected to a base station apparatus via a common wireless line, the base station apparatus managing an assignable period for wireless terminal device in an uplink communication period of first to third wireless frames as a demand assignment period, managing a remaining period as a random access period, and assigning a requested uplink communication bandwidth according to bandwidth request information from the wireless terminal device, and the wireless terminal device transmitting the bandwidth request information using a random slot in the random access period in case that data to transmit is generated, and transmitting the data using the bandwidth assigned to an uplink demand assignment period from the base station apparatus in case that the bandwidth request information is successfully transmitted, wherein the first to third wireless frames further comprise a common slot for transmitting information notifying of an occurrence of a given event, the first to third wireless frames being transmitted, from the wireless terminal device to the base station apparatus, in order of the first wireless frame, the second wireless frame and the third wireless frame, and the method comprises: transmitting, by the wireless terminal device, information indicating the occurrence of the given event in the wireless terminal device to the base station apparatus using the common slot; determining, by the base station apparatus, the number of random slots assigned as random slots to transmit the bandwidth request information for the given event among random slots in the random access period of the third wireless frame, in case that the base station apparatus receives, from the wireless terminal device, the information, the determination being performed based on the number of random slots included in the first wireless frame transmitted from the wireless terminal device to the base station apparatus; transmitting, by the base station apparatus, information on the assigned random slots to the wireless terminal device of random access period; and transmitting, by the wireless terminal device, the bandwidth request information to the base station apparatus using the assigned random slots of the third wireless frame.