Patent ID: 7808950
Filing Date: 2010-10-05
Classification: H04W

Abstract:
1. A radio communication apparatus comprising: an error detector configured to determine whether a reception packet includes data transmission errors, a signal measuring device configured to measure strengths of a signal of the reception packet independently from the determination of the data transmission errors, a checking unit configured to assess frequency channels using a result whether the reception packet includes the data transmission errors and based on a strength of the signal, and decide that zero or more of the frequency channels are unusable channel in accordance with a result of an assessment of the frequency channels, and a transmission unit configured to transmit a radio signal using one of the frequency channels sequentially without using the unusable channel, wherein the checking unit counts the number of incidents in which the reception packet includes the data transmission errors and the strength of the signal of the packet having data transmission errors exceeds a first threshold, calculates frequency of the incident among the number of times of reception of the packet for each of the frequency channels, decides zero or more of the frequency channels of which the frequency exceeds a second threshold as the unusable channel, and the unusable channel is not used until a preset time elapses, the preset time being variable depending on a frequency of a radio wave transmission of a surrounding interference source.