COMMUNICATION SYSTEM, ITS BASE STATION, AND COMMUNICATION METHOD

摘要

In a communication system of the OFDMA communication method, even when transmission data is temporarily decreased and then increased while communication by a user terminal is in progress, it is possible to continue the communication without lowering the communication throughput of the user terminal and provide a throughput corresponding to QoS to the user terminal. The communication system of the OFDMA method which performs data communication by using one or more sub channels between a base station (1) and a plurality of terminals includes: communication data acquisition means which acquires a communication data amount; and channel allocation means which allocates the sub channel(s) in accordance with the communication data amount. When the communication data amount has decreased, the channel allocation means maintains allocation of at least one of the sub channels which have been allocated.