Patent ID: 6754451
Filing Date: 2004-06-22
Classification: H04B,H04M,Y02D

Abstract:
An infrared transmission/reception apparatus having primary and secondary stations in an infrared communication system of IrDA standard in which said secondary station outputs a station finding response in response to a station finding command from said primary station, comprising:first transmission means for transmitting a station finding command with a predetermined infrared transmission output; second transmission means for transmitting the station finding command with the infrared transmission output which is higher than the infrared transmission output of the station finding command transmitted by said first transmission means when no station finding response with respect to the station finding command transmitted by the first transmission means is returned from the secondary station; third transmission means for transmitting the station finding command with the infrared transmission output which is higher than the infrared transmission output of the previously transmitted station finding command when no station finding response with respect to the station finding command transmitted by the second transmission means is returned from the secondary station; fourth transmission means for transmitting the station finding command with the infrared transmission output which is lower than the infrared transmission output of the station finding command transmitted by said first transmission means when the station finding response with respect to the station finding command transmitted by said first transmission means is returned from the secondary station; fifth transmission means for transmitting the station finding command with the infrared transmission output which is lower than the infrared transmission output of the previously transmitted station finding command when the station finding response with respect to the station finding command transmitted by the fourth transmission means is returned from the secondary station; first control means for again executing the processing by said fifth transmission means when the station finding response with respect to the station finding command transmitted by the fifth transmission means is returned from the secondary station; second control means for again executing the processing by said fourth transmission means when no station finding response with respect to the station finding command transmitted by said third transmission means, said fourth transmission means or said fifth transmission means is returned from the secondary station; and communication means for performing a subsequent communication by using a infrared transmission output for such a station finding command as returning the station finding response from the secondary station when the station finding response with respect to the station finding command transmitted by said second transmission means or said third transmission means is returned from the secondary station.