Described below is an example of a configuration of the hardware of a wireless base station. A wireless base station includes a wireless IF (interface), a processor, memory, a logical circuit, a cable IF, etc. The wireless IF is an interface device for performing wireless communications with a wireless terminal. The processor is a device for processing data, and includes, for example, a CPU (central processing unit), a DSP (digital signal processor), etc. The memory is a device for storing data, and includes, for example, ROM (read only memory), RAM (random access memory), etc. The logical circuit is an electronic circuit for performing a logical operation, and includes, for example, an LSI (large scale integration), an FPGA (field-programming gate array), etc. The cable IF is an interface device for performing cable communications with other wireless base stations connected to a network (what is called a backhaul network) on the network side of a mobile telephone system.

The correspondence between the wireless base station illustrated in FIG. 2 and the hardware is described below for example. The wireless IF corresponds to, for example, the wireless processing unit 205. The processor, the memory, and the logical circuit correspond to, for example, the new data packet transmission unit 201, the retransmission data packet transmission unit 202, the channel assignment unit 203, the modulation unit 204, the transmission control unit 206, and the uplink control channel reception unit 207. The cable IF corresponds to, for example, the X2 control channel transmission/reception unit 208.