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• IrDA Lite - provides methods of reducing the size of IrDA code while maintaining
compatibility with full implementations.
• IrTranP - provides image exchange protocol used in Digital Image capture devices/cameras.
• IrMC - specifications on how mobile telephony and communication devices can exchange
information. This includes phonebook, calendar, and message data. Also how call control and
real-time voice are handled (RTCON) calendar.
• IrLAN - Describes a protocol used to support IR wireless access to local area networks.
• Each of the protocol layers and standards mentioned above can be found on the IrDA FTP site
as separate documents.
11.2 IrDA DATA - Hardware/Protocol Stacks
IrTran-P IrObex IrLan IrCom IrMC
LM-IAS Tiny Transport Protocol - Tiny TP
Ir Link Mgmt - MUX - IrLMP
Ir Link Access Protocol - IrLAP
Async Serial-IR
9600-115.2kb/s
Sync Serial-IR
1.152Mb/s
Sync 4PPM
4Mb/s
11.3 IrDA CONTROL
IrDA Control is an infrared communication standard that allows cordless peripherals such as
keyboards, mice, game pads, joysticks and pointing devices units to interact with many types of
intelligent host devices. Host devices include PCs, home appliances, game machines and
television/web set top boxes. IrDA Control is well suited to deal with devices that leverage the
USB HID class of device controls and home appliances. It is a sophisticated implementation
guideline for bi-directional remote control with MAC enumeration and binding and with LLC
transactions. IrDA Control Protocols consist of a mandatory set of protocols.
• PHY (Physical layer)
• MAC (Media Access Control)
• LLC (Logical Link Control)
Characteristics of IrDA Control Physical Signalling:
• Distance and range equivalent current uni-directional infrared remote control units
(minimum 5-metre range).
• Bi-directional communication is the basis of all specs.
• Data transmission at 75 kb/s at the top end
• The data is coded using a 16-Pulse Sequence multiplied by a 1.5 MHz subcarrier which is
allocated for high speed remote control in IEC 1603-1 although this base band scheme has
harmonics which can intrude upon other IEC bands.
• Data packets are protected with a CRC (CRC-8 for short packets and CRC-16 for long
packets). The physical layer is optimized for low power usage and can be implemented with
low-cost hardware.
Characteristics of IrDA Control MAC:
• Enables a host device to communicate with multiple peripheral devices (1:n) and up to 8
peripherals simultaneously.
• Ensures fast response time (13.8 ms basic polling rate) and low latency.
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