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Old 28th May 2016, 01:48 PM
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Join Date: Apr 2013
Default Re: IRDA Specifications Download

The Infrared Data Association (IrDA) is an industry-driven interest group that was founded in 1993 by around 50 companies. IrDA provides specifications for a complete set of protocols for wireless infrared communications, and the name "IrDA" also refers to that set of protocols.

The main reason for using IrDA had been wireless data transfer over the “last one meter” using point-and-shoot principles

Specifications

IrPHY

The mandatory IrPHY (Infrared Physical Layer Specification) is the physical layer of the IrDA specifications.

It comprises optical link definitions, modulation, coding, cyclic redundancy check (CRC) and the framer.


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 and represents the data link layer of the OSI model.

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.


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

Optional OBEX (Object Exchange) provides the exchange of arbitrary data objects between infrared devices.

It lies on top of the Tiny TP protocol, so Tiny TP is mandatory for OBEX to work.


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.
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