Patent ID: 8521093

Claim:
A wireless communications apparatus which performs wireless communications with an external apparatus, said wireless communications apparatus comprising: an antenna having a directivity that is changeable; a storage unit configured to store a plurality of directional patterns and a plurality of thresholds, the directional patterns each indicating the directivity of said antenna, and the thresholds each being an expected value of a throughput obtained according to a first radio propagation environment parameter indicating a state of a radio propagation environment; and a controller which changes the directivity of said antenna based on a directional pattern selected from the directional patterns, wherein said controller includes: a threshold identifying unit configured to measure the first radio propagation environment parameter by using one of the directional patterns, and identify, from among the thresholds stored in said storage unit, a threshold corresponding to the measured first radio propagation environment parameter; a directional pattern selecting unit configured to: perform test communications by sequentially switching the directional patterns; measure a second radio propagation environment parameter for each of the directional patterns used for the test communications, the second radio propagation environment parameter being different from the first radio propagation environment parameter; and select, from among the directional patterns, a directional pattern having an actual throughput that is greater than the threshold, the actual throughput being calculated from a measurement value of the second radio propagation environment parameter; and a threshold adjusting unit configured to change the threshold identified by said threshold identifying unit, according to the number of test communications that is the number of the directional patterns used for the test communications performed by said directional pattern selecting unit.