Introduction
Transmission means transferring of data between two devices. The way in which data is transmitted from one device to another device is known as transmission modes. It is also known as communication mode.
Types of Transmission Modes
There are three types of transmission modes:
Simplex
In
Simplex mode, the communication is unidirectional, like as one-way street. Only
one of the two devices on a link can transmit, the other can only receive. The
simplex mode can use the entire capacity of the channel to send data in one
direction.
Example: FM Radio, TV Broadcasting, Keyboard, Monitors.
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| Figure: Simplex Mode |
Half Duplex
In
half-duplex mode, each station can both transmit and receive, but not at the
same time. When one device is sending, the other can only receive, and vice
versa. The half-duplex mode is used in cases where there is no need for
communication in both direction at the same time. The entire capacity of the
channel can be utilized for each direction.
Example: Walkie- talkie.
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| Figure: Half Duplex Mode |
Full Duplex
In full-duplex
mode, both stations can transmit and receive simultaneously. In full duplex
mode, sharing can occur in two ways: Either the link must contain two
physically separate transmission paths, one for sending and other for
receiving. Or the capacity is divided between signals travelling in both
directions. Full-duplex mode is used when communication in both direction is
required all the time.
Example: Telephone, Mobile Phones.
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| Figure: Full Duplex Mode |
Which Transmission Mode is best for
communication?
Full Duplex is best transmission mode for communication. Because
User can send and receive data simultaneously. In half Duplex, when user cannot
receive data while data sending process is going on.
Summary of Transmission Modes
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