资料来源 : Free On-Line Dictionary of Computing

statistical time division multiplexing
     
         (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)