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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Journal of The Korea Institute of Intelligent Transport Systems
Journal Basic Information
Journal DOI :
The Korea Institute of Inteligent Transport Systems
Editor in Chief :
Volume & Issues
Volume 2, Issue 2 - Dec 2003
Volume 2, Issue 1 - Jun 2003
Selecting the target year
A Study of DAB Tuner Module for ITS service
Kim Min-cheol ; Sim Wan-ki ; Kim Sang-woo ; Kim Bok-ki ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 1~12
DAB(Digital audio broadcasting) is a next generation radio broadcasting system which provides CD quality audio, various data services and superior reception ability when moving. Also, it can show traffic informations and news literally or graphically. In this paper, we design and fabricate the DAB tuner for ITS service that follows Eureka-147 and ETSI 300 401 specifications. This small-sized tuner can be adopted to mny electronic equipments such as a Hi-Fi audio, DVD player, car audio system etc.. The overall performance of the tuner depends on a phase noise of VCO and the sensitivity of the receiving system is influenced by LNA, image rejection filter and channel selection filter. All our measurement results satisfy the specification for a DAB system with the return loss of 9dB, the noise figure of 6dB for both Band 111 and L-band and the sensitivity of -97dBm.
Development of Traffic Signal Control Strategy by Balancing Queue Lengths for Oversaturated Traffic Condition
Kim Hong Jin ; Kim Youngchan ; Kim Jeong Hyun ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 13~22
It is recognized that one of the problems for the current 'Traffic Adaptive Control System in Seoul' is the performance at the oversaturated condition. Instead of 'Degree of Saturation' adopted in the current system, the methodology of balancing the queue length was developed and evaluated in this study. This method keeps the balance of queue lengths on the intersections and reduces the overall queue lengths. In addition a traffic signal control model was developed based on the method. This model can reduce not only the queue lengths but also the average delay of vehicles according to the macroscopic and microscopic evaluations.
Calculation of Travel Time Using Automatic Vehicle Identification Systems
Moon Hak-Yong ; Ryu Seung-ki ; Kim Sung Hyun ; Park Hyun Suk ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 23~29
This study is the empirical research about application and evaluation of AVI that is an essential technology for calculating and providing the travel time. Travel time calculation and provision is one of the technique for information collecting and providing in the ITS. Through the field test on a national highway, we proposed the travel time calculation technique from the data by non-contact vehicle detecting method and validated field application performance with field data. We proposed the technique of evaluating field application performance, then using this, analyzed recognition rate, detection rate and travel time with field data.
Developing the Test Module of
Lee Ki-Han ; Lee Dae-Kyu ; Yeo Woonsang ; Lee Seung-Hwan ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 31~42
Prepaid plastic card issued by Korea Highway Company had a lot of problems in end-user usage and management. HipassPLUS Card, which is a smart card used for a prepaid electronic payment, overcomes the problems of Prepaid Plastic card. HipassPLUS Card is also designed be compatible to other cards such as public transportation card. Thus, for the safety of using the card in such environment, the functionality and the security of HipassPLUS card should be faultless. This paper developed a test module including the test method, the test checklist, and the test procedure to examine the functionality and security of the payment mechanism of HipassPLUS card. The test module contains the method and the procedure to test the standard items according to the test checklist of HipassPLUS card. The test items and the test checklist of HirassPLUS card was selected under the provision of the specification of Korea Highway Company and ISO standard. The results of evaluation on HipassPLUS card using the proposed test module indicates that 4he HipassPLUS card satisfied the criteria under the characteristics of the functionality, security, and compatibility.
Design and Analysis of Multiple Mobile Router Architecture for In-Vehicle IPv6 Networks
Paik Eun-Kyoung ; Cho Ho-Sik ; Choi Yang-Hee ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 43~54
As the demand for ubiquitous mobile wireless Internet grows, vehicles are receiving a lot of attention as new networking platforms. The demand for 4G all-IP networks encourages vehicle networks to be connected using IPv6. By means of network mobility (NEMO) support, we can connect sensors, controllers, local ,servers as well as passengers' devices of a vehicle to the Internet through a mobile router. The mobile router provides the connectivity to the Internet and mobility transparency for the rest of the mobile nodes of an in-vehicle nv6 network. So, it is .important for the mobile router to assure reliable connection and a sufficient data rate for the group of nodes behind it. To provide reliability, this paper proposes an adaptive multihoming architecture of multiple mobile routers. Proposed architecture makes use of different mobility characteristics of different vehicles. Simulation results with different configurations show that the proposed architecture increases session preservation thus increases reliability and reduces packet loss. We also show that the proposed architecture is adaptive to heterogeneous access environment which provide different access coverage areas and data rates. The result shows that our architecture achieves sufficient data rates as well as session preservation.
Application & evaluation of the data through wireless communication in NHTMS
Ryu Seung-ki ; Moon Huk-Yong ; Park Sang-Gyu ; Park Hyun-Suk ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 55~64
This research is about executing the suitability evaluation of the data through wireless communication system in comparison with the data through the wire system used in National Highway Traffic Management System. The communication system for the evaluation was established on Peoyngteak-Anjung section(about 19 Km) at Route 38 in southern National Highway of the National Capital region where image detectors with the communication by wire were set up. In the situation, the comparison of the data transmission rates between the wire system and the proposed system was accomplished. Before we evaluate the possibility of application about the proposed system, the elements of wireless systems performed the spot investigations. Traffic data transmission test among the equipments was accomplished on the section of the Route 38 where wireless communication equipments were set up. And then, the test of traffic data transmission between the field equipment and the data collective center of wireless communication system was carried out. It evaluated the reliability of wireless communication data for the suitability evaluation of cable/wireless data collected while 73 days.
The Design and Implementation of SSPA(Solid State Power Amplifier) using chip device
Kim Yong-Hwan ; Min Jun-ki ; Kim HyunJin ; Yoo Hyeong-soo ; Lee Hyeong-kyu ; Hong Ui-seok ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 65~72
In this work a 6-stage hybrid power amplifier which can be used for the wireless communication systems for MMC(hficrowave Micro Cell) and ITS wireless communication system is designed and fabricated. Ihe power amplifier's each stages was fabricated Hetero-junction Power FET of bare chip type and an alumina substrate with
=9.9 and 15-mil thickness. The measured results of power amplifier module showed 33.2
36.5 dB small signal gain, 33.0
34.0 dBm output power at forward frequency (17.6 GHa
17.9 CHz) and 36.0
37.0 dB small signal gain, 33.0
34.5 dBm output power at reverse frequency (19.0 GHz
Developing the Test Module of PSAM for
Lee Ki-Han ; Suh Hyun Kyo ; Yoo Chang Hee ; Lee Seung-Hwan ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 73~84
Due to the problems of existing prepaid plastic card issued by Korea Highway Company, the prepaid electronic payment system using a smart card, called HipassPLUS Card, was developed to overcome the Problems. PSAM is one of the main component of the systea which can retrieve the value from HipassPLUS card, transmit the transaction data to CSAM, and store the accumulated account lists. For the safety of the elecoonic payment system, the functions of PSAM should be faultless. This paper developed a test module including the test method, the test checklist, and the test procedure. The test module examines the functionality and security of the payment mechanism to insure that the value stored in HipassPLUS card can be raid to PSAM by the merchants and the standardized SAM. The test module also inspects the transmission mechanism to send and store the transaction data kom PShM to CSAM correctly and safely. Ihe module is designed to test the standard items using the test checklists for PSAM. The test items and the test checklists of PShM was selected under the provision of the specification of Korea Highway Company and ISO standard. Ihe evaluation on PSAM using the test module indicates that PSAM satisfies the evaluation criteria on the quality characteristics of the functionality, security, and compatibility.
Multiple Moving Objects Detection and Tracking Using Snake Model
Woo Jang-Myoung ; Kim Sung-Dong ; Choi Ki-Ho ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 85~95
This paper proposes a multiple moving objects tracking system which is adaptable itself to circumstances. Snake model is sensitive to the start position value because it does not accurately express contours of objects in complex image. It can be improved as the proposed system gets background images by using difference images, segments objects using neighborhood pixels and assesses the position feature values acquired on the start position value to deformable Snake model. And also the system can simplify complex background images and reduce search regions by the constituent points of a Snake laid in Positions of object. It is showed that the proposed system can be appBied to multiple moving vehicle racking systems by the experimental results of 30fps AVI file.
Design of Double Balanced MMIC Mixer for Ku-band
Ryu Keun-Kwan ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 2, issue 2, 2003, Pages 97~101
A MMIC (monolithic microwave integrated circuit) mixer chip using the Schottky diode of an InGahs/CaAs p-HEMT process has been developed for the receiver down converter of Ku-band. A different approach to the MMIC mixer structure is applied for reducing the chip size by the exchange of ports between If and LO. This MMIC covers with RF (14.0 - 14.5 GHz) and If (12.252 - 12.752 GHz). According to the on-wafer measurement, the miniature (3.3X3.0 m) MMIC mixer demonstrates conversion loss below 9.8 dB, RF-to-IF isolation above 23 dB, LO-to-IF isolation above 38 dB, respectively.