Embedded ethernet system for real-time communication
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Date
2017-06
Authors
Ng, Eng Khang
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Abstract
Real-time communication (RTC) is a type of transmission that occur with minimum latency or delay. It can be categorized into two types: soft RTC and hard RTC. RTC is important in certain applications that required the data to be delivered from source to destination within a specific period of time. Meanwhile, a standard Ethernet implements carrier sense multiple access with collision detection (CSMA/CD) as the media access control (MAC) protocol to govern and control the data transmission between stations in a shared medium. The MAC protocol also contains the backoff algorithm that responsible for rescheduling the transmission of a packet after a collision happens. In this project, an embedded Ethernet network model with different number of nodes and a shared channel is designed and constructed. Different backoff algorithms such as Binary Exponential Backoff (BEB), Linear, Pessimistic Linear Exponential Backoff (PLEB) and Fibonacci Backoff (FEB) are applied to the network model to study and analyze their performances. The performance criteria such as delay of each packet and the number of packets delivered are evaluated. Matlab, Simulink and Stateflow are used as the main software for simulation. The final results showed that the types of backoff algorithms used have an enormous effect on the network performance in term of delay.