Patent ID: 7639637

Claim:
A wireless apparatus that selects one of a plurality of wireless access points so as to perform wireless communication therewith, the wireless apparatus comprising: a scanning unit that scans accessible wireless access points; a calculating unit that calculates an estimated communication efficiency value of each wireless access point on the basis of received signal strength, interference signal strength, and interference adjacency of each of the scanned wireless access points; a selecting unit that selects one of the scanned wireless access points on the basis of the estimated communication efficiency values calculated by the calculating unit; and a memory that stores approximate relation data indicating a relationship between the received signal strength and a packet error rate, wherein: the calculating unit calculates an estimated packet error rate of each wireless access point on the basis of the received signal strength, the interference signal strength, and the interference adjacency, thereby obtaining the estimated communication efficiency value, and the calculating unit corrects the approximate relation data stored in the memory on the basis of the interference signal strength and the interference adjacency and then calculates the estimated packet error rate on the basis of the received signal strength by using the corrected approximate relation data.