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WIRELESS AND MOBILE SYSTEM PROTOCOLS─ IrDA


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IrDA


Used in mobile phones, digital
cameras, keyboard, mouse, printers to
communicate to laptop computer and
for data and pictures download and
synchronization.

Used for control TV, air-conditioning,
LCD projector, VCD devices from a
distance


IrDA protocol suite


Supports data transfer rates of up to 4 Mbps

Supports bi-directional serial
communication over viewing angle between
± 15° and distance of nearly 1 m

At 5 m, the IR transfer data can be up to
data transfer rates of 75 kbps

Should be no obstructions or wall in
between the source and receiver



Five levels of communication


Level 4 ─ sync communication.
Synchronisation software, for example,
ActiveSync or HotSync is used.

Level 5 ─ SyncML (synchronisation
markup language) based
communication. A SyncML protocol is
used for device management and
synchronization with server and client
devices connected by IrDA.



Summary


We learnt

IrDA used when IR source and
receiver interface present in the
devices

Line of sight and unobstructed up to 5
m 75 kpbs and up to 1 m 4 Mbps
communication