The Infrared Data Association (IrDA) is an industry-driven interest group that was founded in 1993 by around 50 companies.

The IRDA Device Specifications are given below :

IrPHY

The mandatory IrPHY (Infrared Physical Layer Specification) is the physical layer of the IrDA specifications. It comprises optical link definitions, modulation, coding

use different modulation/coding schemes:

SIR: 9.6–115.2 kbit/s, asynchronous, RZI, UART-like, 3/16 pulse
MIR: 0.576–1.152 Mbit/s, RZI, 1/4 pulse, HDLC bit stuffing
FIR: 4 Mbit/s, 4PPM
VFIR: 16 Mbit/s, NRZ, HHH(1,13)
UFIR: 96 Mbit/s, NRZI, 8b/10b

IrLAP

The mandatory IrLAP (Infrared Link Access Protocol) is the second layer of the IrDA specifications. It lies on top of the IrPHY layer and below the IrLMP layer.

The most important specifications are:
Access control
Discovery of potential communication partners
Establishing of a reliable bidirectional connection
Distribution of the primary/secondary device roles
Negotiation of QoS parameters

IrLMP

The mandatory IrLMP (Infrared Link Management Protocol) is the third layer of the IrDA specifications most important achievements are:
Provides multiple logical channels
Allows change of primary/secondary devices

Tiny TP

The optional Tiny TP (Tiny Transport Protocol) lies on top of the IrLMP layer. It provides:
Transportation of large messages by SAR (Segmentation and Reassembly)
Flow control by giving credits to every logical channel

IrCOMM

The optional IrCOMM (Infrared Communications Protocol) lets the infrared device act like either a serial or parallel port. It lies on top of the IrLMP layer.

OBEX

The optional OBEX (Object Exchange) provides the exchange of arbitrary data objects (e.g., vCard, vCalendar or even applications) between infrared devices.

IrLAN

The optional IrLAN (Infrared Local Area Network) provides the possibility to connect an infrared device to a local area network. There are three possible methods:
Access point
Peer-to-peer
Hosted

IrSimple

IrSimple achieves at least 4 to 10 times faster data transmission speeds by improving the efficiency of the infrared IrDA protocol.
A 500 KB normal picture from a cell phone can be transferred within 1 second.

IrSimpleShot

One of the primary targets of IrSimpleShot (IrSS) is to allow the millions of IrDA-enabled camera phones to wirelessly transfer pictures to printers, printer kiosks and flat-panel TVs