IrDA (Infrared Data Association)

Introduction:
IrDA(Infrared Data Association) is one type of personal communication area network which is deployed in infrared rays.

IrDA Applications:

• The data transfer takes place between a laptop(computer) and a Mobile when both come into vicinity and line-of-sight of the IR receivers and detectors in each of them.
• To Send a document from a notebook computer to a printer.
• By Exchanging business cards which are handheld by the PCs.
• This provides the flexibility for coordinating schedules and telephone books with a desktop and notebook computers.
• Point to shoot communication from peer to peer is a main characteristic for this protocol.

IrDA Protocol Layers:
There are different IrDA protocol layers are there

• Application Layer
• Session Layer
• IrLMIAS
• IrTinyTP
• IrLMP
• Physical Layer

IrDA Protocol Layers

Application Layer:

• In this application layer protocol security plays a vital role.
• Sync(PIM), Object Push(PIM) or Binary File Transfer are the functions provided by this layer.

Session Layer:
IrOBEX , IrLAN , IrBus , IrMC , TrTran , IrComm are present in this layer to perform different tasks.

IrTinyTP:

• Segmentation and reassembly takes place in this layer .
• It provides connection to IrLMP.

IrLMP:

• It multiplexes multiple applications data as well as exclusive link access.
• It provides an Ad-hoc connection between peers.

Physical Layer:

• This layer has an ability for accessing half duplex or alternating directions duplex access.
• It provides a value 1 m or 10 cm(For low power LED).
• Different Modes: Synchronous PPM, Synchronous Serial ,Asynchronous Serial

Session and Transport IrDA Protocol:

• For infrared LAN access IrLAN is used.
• For accessing the serial bus by joysticks, keyboard, mice and game ports IrBUS is used.
• In this protocol IrMC provides mobile communication and telephony protocol.
• IrTran is a transport protocol for image file transfers.
• IrComm protocol is used by emulating serial(Ex. RS232CCOM) or parallel port.