Patent ID: 6525854
Filing Date: 2003-02-25
Classification: H04B,H04M,Y02D

Abstract:
A portable radio terminal, detachably mountable on a vehicle-carried adapter, for infrared communication selectively with a vehicle-carried adapter as a first apparatus located within hailing distance, as a communication partner, and a second apparatus located remotely, as a communication partner, comprising:an infrared communication section for transmitting and receiving signals in an infrared frequency band to and from a selected one of the vehicle-carried adapter and the second apparatus; communication-partner detection means for detecting the second apparatus, whichever is currently in infrared communication with said terminal, as the communication partner; and control means, responsive to the detection of said communication-partner detection means, for controlling said infrared communication section in such a manner that an emission power of said infrared communication section is normal enough to ensure infrared communication if the detected communication partner is the vehicle-carried adapter, and that the emission power of said infrared communication is higher than such normal emission power if the detected communication partner is the second apparatus.