Difference Between Simplex vs. Half Duplex vs. Full Duplex Transmission Modes

Main Difference

The main difference between these three modes of transmission is that the simplex mode supports single way data traveling, the half-duplex mode is able to transmit data two ways but one way at a time and the full-duplex is the two-way simultaneous transmission of data.

Simplex vs. Half Duplex vs. Full Duplex Transmission Modes

Data transmission modes are basically of three types based on data speed, channel, and delivery. They are also termed as data transmission modes. The simplex transmission mode is the data delivery model in which data is only sent in a single direction. The sender sends the data and does not possess the ability to receive. A common example of simplex transmission includes tv and radio broadcasting service. Half-duplex transmission mode comprises of bidirectional communication but uses a single channel. The data can be sent or received in half-duplex transmission at a time. Whereas the full-duplex transmission mode is advanced of all supporting two-way data delivery at the same time. Data can be sent and received both at the same time.

Comparison Chart

SimplexHalf DuplexFull Duplex
The simplex transmission mode is the simplest kind of communication mode that is unidirectional. The data can only be sent towards a single direction.Half Duplex mode of transmission is the kind of communication mode that supports two-way communication but with delay. Data can travel only in one direction at a time.Full-Duplex mode of transmission is the advanced communication mode that is bidirectional. Data can be sent and received from both directions at the same time.
Real-life Examples
Television and radio broadcastsWalkie-talkie. Text messageInstant Chat rooms, Audio Video Calls.
Performance
less efficient than half and full duplex.Better performance than simplex but not efficient as full duplex.Better performance from both simplex and half duplex.
End to End Communication
Data is only sent. Can not be received.Data can be sent or received at a time.Data can be sent and received simultaneously.
Direction of Data
UnidirectionalBidirectional but once at a time.Bi-directional communication instantaneously.

What is Simplex Transmission?

The simplex transmission mode is the simplest kind of communication mode that is unidirectional. The data can only be sent towards a single direction. The sender possesses the ability to send the data only, data cannot be received in such sort of transmission mode. Common examples of simplex transmission mode include television and radio broadcasts, Data entry via peripheral devices such as mouse keyboard, etc. all fall in simplex transmission. It is old technology data communication phenomena and is considered less efficient than half and full-duplex.

What is Half Duplex Transmission?

The half Duplex mode of transmission is the kind of communication mode that supports two-way communication but with delay. Data can travel only in one direction at a time. It comprises of a single channel for both sending and receiving the data. Common examples of half-duplex transmission mode include communication via Walkie-talkie. Text message services on the cellular network are kind of half-duplex communication. Half-duplex modes are still in use publicly but are being replaced by full-duplex modes being more efficient and user-friendly.

What is Full Duplex Transmission?

Full-Duplex mode of transmission is the advanced communication mode that is bidirectional. Data can be sent and received from both directions at the same time. It comprises of dedicated channels for both sending and receiving. Common examples of full-duplex transmission mode include telephonic call communication. A modern-day example includes video calling, instant chatrooms, etc. The full-duplex data transmission mode is better in performance from both simplex and half-duplex and is based on the latest technology. Unlike the simplex mode of transmission, full-duplex has two different data communication channels established for smooth data sending and receiving both. Nowadays data and communication are happening via multiple channels and data is transmitted in multiple directions at the same time.

Key Differences

  1. Simplex transmission mode is unidirectional.
  2. The half-duplex transmission mode is bidirectional but supports single way communication at a time.
  3. The full-duplex transmission mode is bidirectional and supports two-way communication at the same time.
  4. The television broadcast is the most common example of the simplex transmission mode.
  5. Data can only be sent by a sender in Simplex transmission mode and cannot be received.
  6. Data can be sent and received in half-duplex transmission mode, but one thing one time.
  7. Data can be sent and received by both sender and receiver at the same time in full-duplex transmission mode.

Comparison Video

Conclusion

Simplex mode is the unidirectional mode of transmission, whereas the half-duplex transmission mode is two way but one way at a time and on the flip side full-duplex is two-way data transmission simultaneously.

Author:

Harlon Moss

Harlon currently works as a quality moderator and content writer for Turpy Media. He graduated from the University of California in 2010 with a degree in Computer Science. Follow him on Twitter @HarlonMoss or on Pinterest @HarlonMoss

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