• Journal of Digital Convergence
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• v.10 no.6
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• pp.225-230
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• 2012

When a car accident happened, the accident vehicle should broadcast a safe message to its neighbors in multi-hop. However, the pure flooding is difficult to protect a chain-reaction collision because of the frequent collision and the communication delay. To solve this problem, we proposes a back-off algorithm applied to the estimation of the neighbor node count using the t-distribution. And we proposes a MAC protocol preventing the communication delay by separating the neighbor's count collection channel and data channel. As a result, we show the frame reception success rate of our protocol improved more 10% than the previous protocol.

• Journal of the Korea Convergence Society
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• v.6 no.1
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• pp.93-101
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• 2015

As the axle at the vehicle of railway has the important role for safe running, the strength, and impact-proof, safety factor, stress and deformation must be considered. There are the simulation models of 1 and 2 in this study. These models are investigated by performing the convergence technique through the design, the structural and fatigue analyses with CATIA and ANSYS. As the maximum deformation and equivalent stress of model A are lower than those of model B, model A has more durability than model B. The durability to prevent the damage can be investigated by applying the result of this study into the part design of the vehicle of rail road. And it is possible to be grafted onto the convergence technique at design and show the esthetic sense.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.767-768
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• 2017

국토교통부에 따르면 2014년, 대한민국의 자동차 1대당 인구수가 2.56명으로 기록되었다고 한다. 또한, 교통안전공단에 의하면, 2015년 총 교통사고는 23만 2035건이 발생하였고 이로 인한 사망자는 4621명이라고 한다. 그 중 약 53%인 12만 3760건이 폭이 9m 미만인 이면도로에서 발생하였고 이로 인한 사망자는 전체 사망자의 약 56%인 2586명이라고 한다. 이는 상당히 수의 사고들이 이면도로에서 일어나고 있음을 알려준다. 국민 안전의 측면에서 많은 사고의 위험이 있는 이면도로에 사고를 예방할 수 있는 대책이 시급하다. 이에 본 논문에서 IoT(사물인터넷)을 기반으로 한 이면도로에서의 사고 예방 장치를 제시하여 '차량과 차량'뿐만 아니라 '차량과 보행자', '차량과 자전거' 충돌사고 문제해결에 접목하였다.

• Journal of the Korean Society for Railway
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• v.12 no.6
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• pp.865-872
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• 2009

Korean railroad company is continuously improving the service for the disabled. They also install and reform many facilities for them. However, It is not considered the importance of egress when fire occurred in a cabin Now, Fire hazard analysis and risk assessment are introduced into domestic regulations for improving fire safety performance of train car and railroad facilities. Considering the fact that fire safety evaluation process doesn't fully include disabled person, fundamental egress data for them is very important for life safety aspect. In this paper, Egress experiments and analysis were conducted to measure the movement speed of the disabled with Mugunghwa and Saemaul.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.10
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• pp.2192-2198
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• 2012

VANET is a network environment which provides the communication between vehicles and between vehicle and RSU using wireless communication. VANET is very important to protect safety and life of people. Because of that, security is considered enough and certification is very important when messages exchanged between vehicles. Recently, Zhang proposed using Diffie-Hellman key exchange protocol that is method exchanging messages in VANET system through RAISE. But this is many problems on weakness from various attacks. In this paper, proposed the method that establish symmetric key using ECDH key exchange protocol and confirm safety and time spending that generate key and exchange through comparison.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.4
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• pp.9-16
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• 2015

Quick and safe message transmission is an important research topic of vehicular ad hoc networks (VANET). Most studies assume that the periodic broadcast of beacon-frames between vehicles increases the safety of the driver. In this paper, we propose a medium access control (MAC) protocol and location-based clustering for the VANET to support reliable data transfer. In our proposal, the cluster heade (CH) manage the access and allocate the resources of the node. Our proposal uses simulation to confirm the reduction of the transmission delay and the collision rate of the signal.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.525-527
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• 2013

최근 IT 기업들이 자동차에 IT도입에 열을 올리고 있으며, 그 중에서도 미터 클러스터는 운전자의 편의성을 고려하여 많은 연구와 관심이 증대되고 있다. 자동차 계기판은 전자기기의 발전과 더불어 아날로그 계기판, 디지털 계기판, 이 둘을 함께 사용한 하이브리드 계기판, 그리고 보다 상세한 정보를 이미지와 함께 제공해 주는 스마트 하이브리드 계기판으로 발전하고 있다. 기존의 미터 클러스터는 단순히 차량의 제한된 정보를 표시하며, 운전자의 운전 상태에 따른 시인성이 부족하며, 차량의 상태, 그리고 운행지역의 주변 환경적 정보의 부족으로 인해 운전자의 안정성이 고려되지 못한 부분이 많아 운전자의 안전 운전에 도움이 되지 못하는 부분이 많다. 따라서 본 논문에서는 차량의 상태, 운행 환경정보 등의 통합 된 정보를 LCD 디스플레이 기반에서 운전자의 시인성과 안정성 우선으로 하는 레이아웃을 연구하고자 한다.

• Journal of the Korean Institute of Intelligent Systems
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• v.20 no.3
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• pp.400-405
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• 2010

This paper deals with implementation of intelligent head up display for vehicle safety system. The Implanted new intelligent transport system offer the potential for improved vehicle to driver communication. The most commonly viewed information in a vehicle is from the Head up display, where speed, tachometer, engine RPM, navigation, engine temperature, fuel gauge, turn indicators and warning lights provide the driver with an array of fundamental information. TFT LCD, LCD Back light led, plane mirror, lens and controllers parts were designed to head up display system. Finally, In this paper, we analyze intelligent head up display system for vehicle of driver safety.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.5
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• pp.919-929
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• 2013

Recently, a variety of IT technologies are applied to the vehicle. However, some vehicle-IT technologies without security considerations may cause security problems. Specially, some researches about a smart key system applied to automobiles for authentication show that the system is insecure from replay attacks and modification attacks using a wireless signal of the smart key. Thus, in this paper, we propose an authentication method for the driver by using driving patterns. Nowadays, we can obtain driving patterns using the In-vehicle network data. In our authentication model, we make driving ppatterns of car owner using standard normal distribution and apply these patterns to driver authentication. To validate our model, we perform an k-fold cross validation test using In-vehicle network data and obtain the result(true positive rate 0.7/false positive rate is 0.35). Considering to our result, it turns out that our model is more secure than existing 'what you have' authentication models such as the smart key if the authentication result is sent to the car owner through mobile networks.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.16 no.6
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• pp.53-66
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• 2017

In order to improve traffic flow and vehicular safety, installation of roundabouts is encouraging recently. Roundabouts are generally installed at which traffic flow and pedestrian flow is relatively low intersections. Roundabouts reduce vehicle speed, minimize vehicle weaving, and reduce critical conflict points. For these reasons, roundabouts are generally operated unprotected pedestrian crosswalk, thus a shortcoming for pedestrian safety always exists at roundabouts. The purpose of this study is developing a dynamic signal metering algorithm for traffic and pedestrian at four-way-approach with two-lane roundabouts in which three different operation algorithms(fixed-time pedestrian, vehicle signal metering, and vehicle and pedestrian signal metering) are suggested and its performance is tested by using VISSIM. The results of the fixed pedestrian signal operation show that there is a big average delay increase in general and that increases up to 51.4 seconds/vehicle(42.5%) when the total number of approaching vehicle is 3,800 vehicle/hour. However, the results of the simultaneous dynamic signal metering operation for the vehicle and pedestrian crossing with push button show that there is a substantial average delay reduction up to 40.6 seconds/vehicle(42.7%) when the total number of approaching vehicle is 3,000 vehicle/hour.