Authors
Abstract
The aim of this research is to design and simulate a fuzzy logic
controller (FLC) to control the cell multiplexing in Asynchronous Transfer
Mode(ATM) networking , which is a high performance cell oriented switching
technology that utilizing of small size packet to carry different types of service for
traffic and to show the effect of using the fuzzified variables (queuing message
length and the number of inputs) on cell flow rate (control action) on the output of
(FLC).The paper presents the previous works, principles of operations, cell
multiplexing, principles of fuzzy logic and internetworking with ATM network, the
design process of system and the output of simulation. The cell flow rate on the
output of fuzzy logic controller (FLC) which has been simulated depends on the
input variables, one of them is the queuing message (message length), and the
second one is the number of inputs. The simulation of fuzzy controller has been
executed by using (MATLAB). In the light of this research, an important
conclusion can be drawn, is that increasing of the fuzzified inputs variables means
that cell queuing will increasing so the (FLC) will achieve size of packet to be
large then the flow bit-rate of cell (control action) will decrease and when the
number of inputs decreases that will let to achieve a high flow bit-rate as
(M.Q=0.5,N=o.5,the control action (cell rate) =0.5 cells/s) and if (M.Q=0.2, N=0.5,
the control action(cell rate=0.77 cells/s).Using parameters such as ( message
length and No. of inputs)as fuzzified variables in controlling cell multiplexing
gives a flexible and a high speed responding to sudden changes in selective
variables and get bit-rate which reduces time delay for different types of
services(text, image, video and audio) which cause to get a high throughput, that is
the maximum throughput under FLC parameters (with message length and No. of
inputs) is (562.7Mbit/s) for text message, (568Mbit/s) for image message,
(563.4Mbit/s) for the video message and (563.4Mbit/s) for audio message
Keywords
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