Patent ID: 7627298

Claim:
A wireless communication method in which a base station and a wireless terminal communicate with each other, including: a step at which a first and a second base station each including a plurality of beam areas transmit, for each beam area, a pilot signal including identification information to identify the base station and the beam area, in a beam pattern; a step at which the wireless terminal receives the pilot signals for each beam area from the first and the second base station and obtains received power of each pilot signal; a step at which the wireless terminal causes one of the beam areas of the first base station to be a desired wave beam area; a step at which the wireless terminal determines a first data rate based on the received power of a first interference beam area where the received power of the pilot signal from the second base station is highest or where the received power is a previously determined second threshold or higher and, the received power of the pilot signal of the desired wave beam area; a step at which the wireless terminal determines a second data rate based on the received power of a second interference beam area which is one of beam areas where the received power of the pilot signal from the second base station is lower than the received power of the pilot signal of the first interference beam area and, the received power of the pilot signal of the desired wave beam area; a step at which the wireless terminal transmits the determined first and second data rates and the identification information of the first interference beam area to the first base station; a step at which the first base station assigns a slot to the wireless terminal; a step at which the first base station refers to beam scheduling information including identification information of a beam pattern to be used in each slot by the second base station, selects, in a case where the identification information of the beam area to be used by the second base station in the slot assigned at the assigning step is coincident with the identification information of the first interference beam area received from the wireless terminal, the first data rate received from the wireless terminal, and selects, in a case where the identification information of the beam area to be used by the second base station is not coincident with the identification information of the first interference beam area, the second data rate received from the wireless terminal; a step at which the first base station modulates data in accordance with one of the selected first data rate and second data rate, and transmits modulated data to the wireless terminal; and a step at which the wireless terminal decodes the data received from the first base station using the first and/or second data rate.