Segmentation

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segmentation

[‚seg·mən′tā·shən]
(communications)
The division of a long communications message into smaller messages that can be transmitted intermittently.
(computer science)
The division of virtual storage into identifiable functional regions, each having enough addresses so that programs or data stored in them will not assign the same addresses more than once.
The division of a large computer program into smaller units, called segments.
(zoology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Segmentation

 

in linguistics, the linear division of speech or a text into segments that correlate with specific language units. Segments may be meaningful, as in the case of sentences, words, and morphemes (syntactic and morphological segmentation), or not meaningful, as in the case of syllabemes and phonemes (phonetic segmentation). “Dual linguistic segmentation,” a term introduced by A. Martinet, is also used in this regard. Segmentation is a syntagmatic procedure that precedes definition of paradigmatic units, which are established by comparison of segments. Linguists oppose segmental units to the suprasegmental units of language.


Segmentation

 

(1) In morphology, the division of the body of some animals or of individual organs into a linear series of segments, or metameres. (2) In embryology, a series of consecutive divisions of an egg.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

segmentation

(networking)
(Or "segmentation and reassembly", SAR) Breaking an arbitrary size packet into smaller pieces at the transmitter. This may be necessary because of restrictions in the communications channel or to reduce latency. The pieces are joined back together in the right order at the receiver ("reassembly"). Segmentation may be performed by a router when routing a packet to a network with a smaller maximum packet size.

The term "segmentation" is used in ATM, in TCP/IP, it is called "fragmentation" an is performed at the IP layer before the "fragments" are passed to the transport layer.

See for example ATM forum UNI 4.0 specification.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
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