Asynchronous data transfer

The asynchronous data transmission is a transmission method of communication engineering , asynchronously with the character, that is, at any time and can be transferred. In contrast to synchronous data transmission , the transmission is not based on a clock signal .

Asynchronous data transmission is plesiochronous at the bit level : Approximate synchronism between sender and receiver is only established and maintained for the duration of one character. The process is also called the start-stop process. Since the demands on the quality of the synchronization are lower, it can be achieved more quickly (within one bit time or cycle time). Since two bit times are reserved for this, the bit rate is lower than with synchronous data transmission.

Risk of confusion

Asynchronous data transmission should not be confused with the term asynchronous communication , which refers to the sequence of request and response in a transmission protocol .

literature

• Peter Welzel, Harald Schummy (ed.): Data transmission. LAN and Internet protocols for IT professions, 4th edition, Friedrich Vieweg & Sohn Verlag, Wiesbaden 2001, ISBN 978-3-528-34369-9 .

See also

• Stop bit
• serial data transmission
• parallel data transmission
• UIT 34.13
• Carrier Sense Multiple Access

Web links

• Asynchronous data transfer (accessed July 30, 2018)
• COMPUTER NETWORKS II (accessed on July 30, 2018)
• Deterministic and synchronized transmission of audio data via Ethernet (accessed July 30, 2018)