IrDA Protocols Flashcards

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IrDA Physical Layer Protocol (IrPHY)

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Controls the hardware that sends and receives the IR pulses through the emitter.

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IrDA Infrared Link Access Protocol (IrLAP)

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Encapsulates the frames and describes how devices establish and close connections. It also prevents internal conflicts between devices and is similar to the IP protocol.

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Function of IrLAP

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Encapsulates frames and manages device connections and conflicts.

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IrLAP Protocol Layer

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IrLAP is a link protocol, different from IP protocol in address resolution.

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Service Detection in IrLMP

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Detects presence of devices offering a service and checks data flow.

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Application Use of IrLMP

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Applications use the IrLMP layer to check if a required device is within range.

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IrLMP Layer Function

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Used by applications to ask if a required device is within range.

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IrDA Object Exchange Protocol (IrOBEX)

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Defines PUT and GET commands, allowing binary data transfer between devices. Built on top of TinyTP. The standard defines what a packet must contain for devices to recognize each other and communicate.

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IrTran-P (Infrared Transfer Picture) Specification

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Specifies how to transfer pictures over the infrared interface, created by companies manufacturing digital cameras, and is built on top of TinyIP.

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Function of Extensions to IrOBEX

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Defines how to transfer information to GSM networks for mobile devices like handhelds, PDAs, and cellular phones.