Embedded ethernet system for real-time communication
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Date
2018-06
Authors
Durgesh Thiagarajan
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Abstract
Real-time communication (RTC) indicates the transmission of data or message between two
medium that occur with minimum delay or latency. There is two type of real-time
communication such as soft RTC and hard RTC. A common Ethernet network functions
based on the carrier sense multiple access with collision detection (CSMA/CD) as the media
access control (MAC) protocol for data transmission between shared medium. Moreover, a
backoff algorithm is the part of MAC protocol which implements for rescheduling the
transmission of a packet after a collision occurs. An embedded Ethernet network model is
modified with a different number of nodes and backoff algorithms such as Binary
Exponential Backoff (BEB), Modified Binary Exponential Backoff (MBEB), Exponential
Increase and Exponential Decrease Backoff (EIED) and Linear/Multiplicative Increase
Linear Decrease Backoff (LMILD). The Ethernet network model is used to analyze the
performance of the backoff algorithm in a different number of nodes. The end delay of each
packet, the number of packet collision and number of packet delivered are determined based
on the analysis. MATLAB, Simulink, and Stateflow are used for the Ethernet network model
simulation. Based on the simulation, EIED backoff algorithm gave better performance in
term of average delay compare to other algorithms. In this case, EIED shows 0.0006257s
average delay in 5 nodes, 0.0006252s average delay in 10 nodes and 0.0006260s average
delay in 20 nodes.