time division multiplexing - определение. Что такое time division multiplexing
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Что (кто) такое time division multiplexing - определение

TECHNOLOGY WHICH MULTIPLEXES A NUMBER OF OPTICAL CARRIER SIGNALS ONTO A SINGLE OPTICAL FIBER BY USING DIFFERENT WAVELENGTHS
DWDM; Dense wave division multiplexing; Wavelength Division Multiplexing; Wave division multiplexing; Wavelength-division multiplexed; Coarse wavelength division multiplexing; CWDM; Dense WDM; Coarse WDM; Dense wavelength division multiplexing; Wave-division multiplexing; Wavelength Division Multiplex; Wavelength division multiplex; Dense wave-division multiplexing; Wavelength division multiplexing; Dense wavelength-division multiplexing; Wavelength-division multiple access; Wavelength Division Multiple Access; Wavelength Division Multiplexors; Dense Wavelength Division Multiplexing; Wavelength division multiple access; Shortwave Wavelength Division Multiplexing; Coarse wavelength-division multiplexing; Wavelength-division duplexing
  • WDM System in rack 19/21<nowiki>''</nowiki>
  • Series of SFP+ transceivers for 10 Gbit/s WDM communications
  • WDM multiplexer for DWDM communications

time division multiplexing      
<communications> (TDM) A type of multiplexing where two or more channels of information are transmitted over the same link by allocating a different time interval ("slot" or "slice") for the transmission of each channel. I.e. the channels take turns to use the link. Some kind of periodic synchronising signal or distinguishing identifier is usually required so that the receiver can tell which channel is which. TDM becomes inefficient when traffic is intermittent because the time slot is still allocated even when the channel has no data to transmit. Statistical time division multiplexing was developed to overcome this problem. Compare wavelength division multiplexing, {frequency division multiplexing}, code division multiplexing. (2001-06-27)
statistical time division multiplexing         
Statistical multiplexer; Packet mode; Statistical multiplexor; Packet oriented; Stat-mux; Statmux; Stat mux; Variable bandwidth multiplexing; Variable capacity multiplexing; Statistical multiplexing; Statistical time division multiplexing
<communications> (STDM, StatMUX) A system developed to overcome some inefficiencies of standard {time division multiplexing}, where time slices are still allocated to channels, even if they have no information to transmit. STDM uses a variable time slot length and by allowing channels to vie for any free slot space. It employs a buffer memory which temporarily stores the data during periods of peak traffic. This scheme allows STDM to waste no high-speed line time with inactive channels. STDM requires each transmission to carry identification information (i.e. a channel identifier). To reduce the cost of this overhead, a number of characters for each channel are grouped together for transmission. ["Data Communications, Computer Networks and Open Systems", Halsall & Fred, Addison Wesley, p160-161, 1995]. ["Digital, Analog, and Data Communication", Sinnema & McGovern, Prentice Hall, p245, 1986]. (1997-03-05)
Statistical time-division multiplexing         
Statistical multiplexer; Packet mode; Statistical multiplexor; Packet oriented; Stat-mux; Statmux; Stat mux; Variable bandwidth multiplexing; Variable capacity multiplexing; Statistical multiplexing; Statistical time division multiplexing
Statistical multiplexing is a type of communication link sharing, very similar to dynamic bandwidth allocation (DBA). In statistical multiplexing, a communication channel is divided into an arbitrary number of variable bitrate digital channels or data streams.

Википедия

Wavelength-division multiplexing

In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light. This technique enables bidirectional communications over a single strand of fiber, also called wavelength-division duplexing, as well as multiplication of capacity.

The term WDM is commonly applied to an optical carrier, which is typically described by its wavelength, whereas frequency-division multiplexing typically applies to a radio carrier which is more often described by frequency. This is purely conventional because wavelength and frequency communicate the same information. Specifically, frequency (in Hertz, which is cycles per second) multiplied by wavelength (the physical length of one cycle) equals the velocity of the carrier wave. In a vacuum, this is the speed of light, usually denoted by the lowercase letter, c. In glass fiber, it is substantially slower, usually about 0.7 times c. The data rate in practical systems is a fraction of the carrier frequency.