Patent ID: 7496067

Claim:
A resource allocating method in a radio packet communication system for transmission and reception of packet data between a base station and a mobile station, in which the base station allocates a necessary resource to communication with the mobile station, the resource allocating method comprising: a reservation signal transmitting step wherein the mobile station transmits a reservation signal containing priority level information about a priority level of communication to let the base station receive the reservation signal; a reserved time length setting step wherein, based on the priority level information in the reservation signal transmitted in the reservation signal transmitting step, the base station sets (i) a length of a reserved time for allocation of a resource, as a reserved time length, and (ii) a start time of the reserved time, and the reserved time length setting step sets a start time of a reserved time corresponding to a low priority in the priority level information to be earlier than a start time of a reserved time corresponding to a high priority in the priority level information; and a resource allocation reserving step wherein, when there is a resource available for allocation in a reserved time region defined by the reserved time length set in the reserved time length setting step, from a predetermined reservation start time, the base station reserves allocation of a resource for the communication with the mobile station having transmitted the reservation signal.