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1 Chap. 1 Introduction

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2 What is Embedded Network System ? Extension of embedded system As microcontroller becomes smaller and less cost, Systems becomes more intelligent and more microcontroller are embedded ex. automotive, robot, ship, refrigerator, air-conditioner, etc. Representative application : intelligent automotive perceive vehicle parameter such as velocity or position, and environmental condition such as road condition or traffic condition be controlled automatically based on inner and outer information Hence, the number of electric components such as microcontroller, acceleration sensor, radar sensor, and motor is increased

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3 Current trend of intelligent vehicle

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4 Why is embedded network system ? direct connection As the number of microcontroller and sensor is increased, wiring cable for connecting devices are rapidly increased. These cause deterioration of system performance and difficulty of system maintenance is not suitable due to exponentially increasing electrical cable

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5 Embedded networking Devices are connected via single or shared wiring cable ex. bus type Advantage of embedded networking reduced wiring resource sharing design flexibility reliability maintenance

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6 Application of Embedded Networking System 1 In-vehicle Networking System IVN (in-vehicle networking) interchange of digital information between vehicle ECU (Electronic Control Unit) Serial Communication Interface for Vehicle ECU Example of IVN First to use IVN in S-Class S-Class passenger car High speed CAN : under 10 components Low speed CAN : under 25 components D2B/MOST : under 6 components

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7 Protocols for IVN ApplicationSystemProtocols Body Control Lamp, Power Windows Door Locks Power Seats Low Speed CAN, LIN, etc. Diagnostic Failure Diagnosis Low Speed CAN Power train & Chassis Control Engine Control Transmission Control Brake Control Steering Control High Speed CAN, FlexRay, Real-time Ethernet, etc. Information & ITS Navigation CD, DVD, Phone MOST, Real-time Ethernet, etc. Safety Airbag Pretensioner Safe-by-Wire BST, DSI, etc.

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8 Volvo S80 series - Red bus : 250Kbps CAN - ABS : Antilock Braking System - ECM : Engine Control Management - ETM : Electronic Transmission Management - SAS : Steering Angle Sensor - TCM : Throttle Control Management - CEM : Central Electronic Module( Gateway) - Green bus : 125Kbps CAN - AUM : Audio Module - CCM : Climate Control Module - DOM/PDM : Driver/ Passenger Door Module - PHM : Phone Module - PSM : Power Seat Module - REM : Rear Electronics Module - RTI : Road Traffic Information -SRS : Safety Restraint system - SWM : Steering Wheel Module - UEM : Upper Electronic Module

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9 Unified Chassis Control (UCC) system CDC control valve EHPS unit Wheel acceleration sensor ESP controller Acceleration sensor CDC controller TPMS controller Sport switch CDC control valve Steering angle sensor and CAN-BUS interface Body acceleration sensor

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10 Typical IVN

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11 Application of Embedded Networking System 2 Industrial Networking System Fieldbus developed for communication of various field devices such as actuator, sensor in manufacturing and control systems IEC 61158 includes various type fieldbus such as Foundation Fieldbus H1, ControlNet, Profibus, P-Net, Foundation Fieldbus HSE, SwiftNet, WorldFIP, Interbus-S Networking for robot reliable and high-speed communication is necessary ex. 1msec between motion controller and servo driver for motor EtherCAT

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12 Networking for Factory Device level Communication among field devices such as controller, switch, actuator, sensor, bar code reader, etc. Cell level Communication among PLC (Programmable Logic Controller), robot, NC (Numerical Control) machine, etc. Plant level Communication among engineering such as CAD (Computer Aided Design), production management such as CAM (Computer Aided Manufacturing), business administration such as inventory or sales

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13 Profibus-FMS WorldFIP DeviceNet Ethernet Profibus-DP Foundation Fieldbus H1 CAN Ethernet

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14 Application of Embedded Networking System 3 Home Networking System home automation/home networking system can monitor and control home appliances such as air-conditioner, microwave, and home automation devices such as light, gas valve by remote device such as PDA, PCS Goals of smart home Comport (home automation/home networking) Enjoyment (home entertainment) Convenience (contents) Fusion technology IT + BT + NT + ET + CT digital home appliance + internet + mechatronics

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15 Architecture of home networking system

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16 Application of Embedded Networking System 4 Ubiquitous Networking Ubiquitous Computing vs. Ubiquitous Network Mark Weisers Ubiquitous Computing (Xerox PARC: Palo Alto Research Center) Existing or being everywhere at the same time (1988) Computing access will be everywhere (1993) Japans Ubiquitous Network (TRON project) Connecting everything and everywhere (1999) Koreas Ubiquitous Sensor Network A communication environment such that everyone can easily use net works, terminals and contents without any stress (2003)

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17 Key of ubiquitous computing Connection Calm technology : Invisible : Embodied virtuality : )

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18 Computing paradigm 2 nd Wave 3 rd Wave 1 st Wave computer > human flowerpot vending machine digital TV bed curtain bathroom building computer = humancomputer < human one computer to many humanone computer to one humanone human to many invisible computer

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19 Key element of USN (Ubiquitous Sensor Network) USN Embedded Systems (small, processing Storage and control) Computing middleware (pro-active, context-awareness) Wireless Networking (self-organized, power-aware communication) Sensor/Device (Mass-produced, low-power, Short range comm, Sensor & actuator)

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20 Example of ubiquitous computing (1) TPMS (tire pressure monitoring system) Telematics (Mobile in Vehicle) system

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21 Example of ubiquitous computing (2)

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22 Example of ubiquitous computing (3)

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23 Example of ubiquitous computing (4)