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김광호(Kwangho Kim),이찬길(Chankil Lee) 한국자동차공학회 2006 한국자동차공학회 Symposium Vol.- No.-
Intelligent Transportation System (ITS) employing advanced communications and control technologies can provide collision avoidance service. Contrary to MANET, in VANET nodes which are vehicles can move with high speed and generally must communicate quickly and reliably. A traditional method as flooding protocol cannot be applied to ITS safety application since it causes a large overhead and high rate of message collisions. To to disseminate emergency message effectively with low overhead, DDT & IVG protocols were presented. In this paper, the advanced protocol to disseminate emergency message among vehicles is proposed in order to avoid collision when accident or any other obstacle in a highway. In emergency situation, the proposed protocol determines transmission availability considering vehicle speeds and relevant area during defer time to broadcast the message effectively. Therefore, emergency message can be transmitted as fast as possible by low collision probability and overhead than other protocols.
윤태민(Taemin Yoon),반호영(Hoyoung Ban),이찬길(Chankil Lee) 대한전기학회 2010 정보 및 제어 심포지엄 논문집 Vol.2010 No.10
In this paper we have presented a smart LED street lightening system to replace existing traditional lightening system. The proposed system is developed around ZigBee protocol which is an emerging ubiquitous sensor network (USN) technology. In this system a single node consists of an LED mounted on top of a controller, to which a number of sensors are wirelessly connected. Depending upon the illumination of LED. In order to communicate with other smart LED's each controller is connected with all other nodes so that a node can adjust its state according to the state of its surrounding nodes. In order to verify out proposed system in real time we have built the system using mel! and implemented in our institution. Other components of the proposed system arc: LED module, power driver board, main controller board, and ambient sensor board.