IrDA
is an international organization that creates and promotes interoperable,
low-cost infrared data interconnection standards. IrDA has a set of protocols
covering all layers of data transfer and in addition has some network
management and interoperability designs. IrDA protocols have IrDA DATA as the
vehicle for data delivery and IrDA CONTROL for sending the control information.
IrDA DATA defines a standard for an interoperable universal two way cordless
infrared light transmission data port.
Features of
IrDA- Range: From contact to at least 1metre. Can
be extended to 2 meters.
- Bi-directional communication is the
basis of all specifications
- Data transmission from 9600 b/s with
primary speed/cost steps of 115 kb/s and maximum speed up to 4 Mb/s
- Data packets are protected using a CRC (CRC-16 for speeds up to 1.152Mb/s and CRC-32 at 4 Mb/s).
If
you examine the benefits of each technology, you can see that Bluetooth and
IrDA are both critical to the marketplace. Bluetooth's ability to penetrate
solid objects and its capability for maximum mobility within the piconet allows
for data exchange applications that are very difficult or impossible with IrDA.
For example, with Bluetooth a person could synchronize their phone with a PC
without taking the phone out of their pocket or purse (this is not possible
with IrDA). The omni-directional capability of Bluetooth allows synchronization
to start when the phone is brought into range of the PC.
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