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Top1. Introduction
With the development of advanced vehicle technology, electronic systems are increasing in vehicle to refine their interpretation and new features. Considering the features of a car, its electronics system is divided into many functional elements, and every element has self-dependent control. Various complex controls and sensors are used in cars to maximize their efficiency and power. To conserve vehicles in normal operation, components in different domain or same domain need to communicate properly to each other. Therefore, to complete this communication inside vehicles different vehicle networks technology has been developed, like as Flex Ray, MOST (Media Oriented System Transport), LIN (Local Interconnect Network), LVDS (Low-Voltage Differential Signaling) and Controller Area Network (CAN) etc. These networks are developed for specific applications or domains. Initially CAN BUS is used in vehicle network but due to some limitations (like restriction on cable length, bit rate and module synchronization etc.), Automotive Ethernet (AE) is replacing CAN network technology. Automotive Ethernet (AE) is used for providing connection in between electronic systems.
AE is designed to meet bandwidth requirements, synchronization requirements, latency requirements and network management requirements. It has wide range of applications including: Diagnostics, Infotainment, Advance Driver Assistance Systems (ADAS) and in vehicle connectivity. In Ethernet data is transferred in the form of packets between nodes, it provides bidirectional communication. AE is a wired hierarchical homogeneous network. Gigabit or 1000BASE-T1 Ethernet is a next generation Automotive Ethernet, can serve as a backbone of the Autonomous car. The Automotive Ethernet (Sana Ullah et al., 2013, pp. 1-12) is used in cars to connect the different electronic systems for providing better and fast communication between them. AE is the physical network used to connect different electronic components used in the vehicles by a wired network. It provides better bandwidth, latency and management requirements.
The Physical Coding Sublayer (PCS) service interface allows the 1000BASE-T1 PCS to transfer information to and from a PCS client. In PCS transmission code is used for improving the transmission characteristic of any type of information to be transferred. In PCS Forward Error Correction (FEC) technique is used for error detection and correction. FEC is a powerful transmission code, it correct limited number of error without the need of retransmission. Several Error Correction Codes (ECC) available for FEC are:
Except Reed Solomon (RS) Code, other error correction codes are not used in Physical layer (or PCS) due to their limitations such as: less error correction capability, less data rate and poor bandwidth. Moreover, these all EC codes are independent of Galois Field (GF) and primitive polynomial except RS code. They can correct error up to several bits. Hamming codes can detect two-bit error, or they can fix only one-bit error without detection of uncorrected errors. The most significant difference between BCH code and Reed Solomon are:
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BCH codes correct bits, while Reed Solomon code corrects symbols.
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BCH codes correct
bit error errors, while RS code corrects
symbols.
BCH codes can correct only random error, while RS code can correct both random and burst error during data transmission. Hence, due to the error correction capability RS codes are preferred over other BCH codes.