In some
data communication
Data communication, including data transmission and data reception, is the transfer of data, transmitted and received over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optic ...
standards, a time unit (TU) is equal to 1024
microseconds.
This
unit of time
A unit of time is any particular time interval, used as a standard way of measuring or expressing duration. The base unit of time in the International System of Units (SI), and by extension most of the Western world, is the second, defined as ...
was originally introduced in
IEEE 802.11-1999 standard
[{{cite book , title=A Field Guide to Wireless LANs: For Administrators and Power Users , first=Thomas , last=Maufer , date=2004 , publisher= Prentice Hall Professional , work=The Radia Perlman Series in Computer Networking and Security Series , isbn=9780131014060 , id=0131014064 , page=144 , url=https://books.google.com/books?id=GB-87qyhc8sC&pg=PA142 , access-date=2015-10-27] and continues to be used in newer issues of the
IEEE 802.11
IEEE 802.11 is part of the IEEE 802 set of local area network (LAN) technical standards, and specifies the set of medium access control (MAC) and physical layer (PHY) protocols for implementing wireless local area network (WLAN) computer com ...
standard.
In the 802.11 standards, periods of time are generally described as integral numbers of time units. The unit allows for maintaining intervals that are easy to implement in hardware that has a 1 MHz clock (by dividing the clock signal in half ten times, rather than operating a
phase-locked loop
A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the input and output phase in lockstep also implies keeping the input and ou ...
or digital divider to divide such a clock signal by 1000).
One time unit is equal to one millionth of a kibisecond (1 TU = 10
−6 Kis).
See also
*
Binary prefix
A binary prefix is a unit prefix that indicates a multiple of a unit of measurement by an integer power of two. The most commonly used binary prefixes are kibi (symbol Ki, meaning ), mebi (), and gibi (). They are most often used in inform ...
*
IEEE 1541
*
Jiffy
References
External links
IEEE 802 Standardsavailable via IEEE Get Program
IEEE 802.11 Tutorial
IEEE 802.11