CHANNEL DETERMINATION METHOD AND WIRELESS COMMUNICATION APPARATUS

摘要

A channel determination method is disclosed that can avoid performance deterioration caused by interference even in a situation in which radio waves from other communication apparatuses including a microwave oven using the same frequency band are mixed. This method detects a predetermined preamble in a received signal when performing carrier sensing while switching between reception frequencies of a receiving section. The method examines, using a counter, how often electric field strength exceeds a predetermined threshold for each channel during the carrier sensing, disables, upon detecting a signal from another 802.11 apparatus, a channel from which the signal is detected and also disables a channel for which the counter shows a count value exceeding the threshold.

主权项

1. A channel determination method in a carrier sensing operation performing a signal receiving operation while switching between reception frequencies of a receiving section, the method comprising:
determining whether or not electric field strength of a received signal exceeds a predetermined threshold; detecting a predetermined preamble in received data during the carrier sensing operation; determining to enable or disable a channel in which the predetermined preamble is detected in the received data, in accordance with the electric field strength of the signal; causing a counter to count up when the electric field strength of the received signal exceeds a predetermined threshold and causing the counter to count down when the electric field strength of the received signal does not exceed the predetermined threshold for each channel during the carrier sensing operation; and disabling each channel when the count value of the counter of a corresponding one of the channels reaches a predetermined value.