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Q Questions are classified into theme
A General explanation
‚ Technical explanation
Theme-1 Questions about infrared communication
Theme-2 Questions about environment for use
Theme-3 Questions about safety
Theme-4 Questions about standard and technology
Theme-5 Other questions
‘ Theme-4F Questions about standard and technology
Q4-1 Is it possible to coexist with now using IrDA ?
A4-1 It depends on the situation. But there is probably no problem because the interference between infrared of both systems is hardly probable in general use.
Q4-2 What is the difference between beam scattering method and narrow beam method ?
A4-2 Typical example of beam scattering method is the remote controller of television and video recorder and it is for low speed communication. Communication is possible if the beam is pointed to the direction of receiving element roughly. In narrow beam method the beam is concentrated by lens as a very narrow beam and it is for high speed communication for example LAN.
‚4-2 In narrow beam method the transmitter and the receiver are located directly on the line and the laser communication is the representative of it. In beam scattering method the transmitted infrared spreads like a cone and the equipment can be easily set because the axis of transmitter and receiver does not necessarily coincide with each other.
Q4-3 What is the difference of the throughput compared with wire method ?
A4-3 If the transmission speed is the same, data can be also transmitted at the same speed in both case of wire method like telephone and wireless method like radio wave and infrared.
‚4-3 In 10Mb/s infrared communication, data can be transmitted at the similar speed with 10Mb/s wire communication.
Q4-4 What is the trend of standardization of the industry ?
A4-4 ARIB (Association of Radio Industries and Businesses) standardized in February 1997 in Japan. (Standard No. : ARIB STD-T50)ARIB (Association of Radio Industries and Businesses) standardized in February 1997 in Japan. (Standard No. : ARIB STD-T50)

 
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Infrared Communication Systems Association (ICSA)
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