What is Irda?
Irda is an abbreviation for i nfra r ed d at and ssociation, an organization that sets communication standards for infrared distances. Irda has existed since 1993 as a supervision of a wide group of infrared technologies. Traditionally, infrared devices, such as old television remote control, use a one -way beam. They send information but are unable to receive information back. Bidirectional infrared devices are essentially more complicated than one -way emitters, so Irda has formed to help maintain a set of standards that everyone can stick to. Irda is relatively cheap, with parts that make it only a pennant, which makes them attractive for use in a wide range of devices. Because Irda's beams are directional, they are relatively secure from resistance and other unauthorized forms of access to information sent by their channel. The current bandwidth can reach up to 16 MB / s (Megabytes per second), although technology in development can drive this maximum speed to more than 100 Mbps. Even medium level speeds usually reach a range of 1-4 MB / s, which is at the same level as parallel ports traditionally used with devices such as printers and cameras.
IRDA specifications are listed as different levels, while higher levels are stacked at the top of the lower. The basic level of IRDA specification is the specification of the infrared physical layer (Irphy), which is necessary in all IRDA devices. This specification determines the angle boundary, speed range, range of amodulation distance for Irda.
The second and third layers of Irda, which are also required, are the Infrared Link Access Protocol (IRLAP) and Infrared Link Management Protocol (IRLMP). IRLAP outlines the ways Irda find and connects with another Irda device. IRLMP outlines,How to make lists of service providers available and how different data channels are found.
Some of the optional protocols that IRDA could use are Irlan, Tiny TP and IRFM. Irlan specification provides instructions on how to enable IRDA to connect to the traditional network of the local area. The tiny TP specifications have methodologies for easy transmissions of large messages and with little data interference. The IRFM specifications are relatively new and aimed to allow devices such as PDA or mobile phones, act as wireless sources of funds. These devices can be directed to a device supporting IRFM, such as the Termi Metro New Genero -Constroje or Soda to deduct money from the account and automatic transaction processing.