Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425212
Keita Watari, Takahiro Shoda, K. Tsudaka, T. Wada, K. Mutsuura, H. Okada
In recent years, there are many collision accidents between vehicles due to human errors. As one of measures against the collision accidents, a radar system mounted on a vehicle has been attracting attention. By the radar mounted on a vehicle, it is possible to recognize the situation around the vehicle. The ranging with automotive infrared radar is very accurate, and able to understand the object existence in the observation around the vehicle. However, in order to grasp the situation around the vehicle, it is necessary to be aware of the attribute of the detected object. The information obtained by the automotive radar vehicle is only the direction and the distance of the object. Thus, the determination of the attribute of the detected object is very difficult. In this paper, we propose a vehicle recognition method by using reflectors. Through experiments, we show that the proposed method is effective for vehicle recognition.
{"title":"Vehicle recognition method using reflectors for automotive infrared laser radar","authors":"Keita Watari, Takahiro Shoda, K. Tsudaka, T. Wada, K. Mutsuura, H. Okada","doi":"10.1109/ITST.2012.6425212","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425212","url":null,"abstract":"In recent years, there are many collision accidents between vehicles due to human errors. As one of measures against the collision accidents, a radar system mounted on a vehicle has been attracting attention. By the radar mounted on a vehicle, it is possible to recognize the situation around the vehicle. The ranging with automotive infrared radar is very accurate, and able to understand the object existence in the observation around the vehicle. However, in order to grasp the situation around the vehicle, it is necessary to be aware of the attribute of the detected object. The information obtained by the automotive radar vehicle is only the direction and the distance of the object. Thus, the determination of the attribute of the detected object is very difficult. In this paper, we propose a vehicle recognition method by using reflectors. Through experiments, we show that the proposed method is effective for vehicle recognition.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122968852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425176
Chao Wei, Jianli Xiao, Yuncai Liu
Traffic state identification is one of the core missions of Intelligent Transportation Systems. In order to correctly identify the state of traffic flow, the traffic speed must be obtained accurately. In Shanghai, most of the industrial loop detectors (ILDs) are installed in a single loop way. These ILDs can only detect the parameters of flow, saturation, etc., but the speed can not be detected. If the relationship between the traffic flow and speed can be mined accurately, we can obtain the speed using the flow data directly. The purpose of this study is to use multiple kernel support vector regression (MKL-SVR) algorithm to model the relationship between the traffic speed and flow, then estimate the speed accurately. Extensive experiments have been performed to evaluate the performances of the four algorithms: polynomial fitting algorithm, BP neural networks, SVR and MKL-SVR. The experimental results show that MKL-SVR has the best and most robust performances.
{"title":"Speed estimation based on multiple kernel learning","authors":"Chao Wei, Jianli Xiao, Yuncai Liu","doi":"10.1109/ITST.2012.6425176","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425176","url":null,"abstract":"Traffic state identification is one of the core missions of Intelligent Transportation Systems. In order to correctly identify the state of traffic flow, the traffic speed must be obtained accurately. In Shanghai, most of the industrial loop detectors (ILDs) are installed in a single loop way. These ILDs can only detect the parameters of flow, saturation, etc., but the speed can not be detected. If the relationship between the traffic flow and speed can be mined accurately, we can obtain the speed using the flow data directly. The purpose of this study is to use multiple kernel support vector regression (MKL-SVR) algorithm to model the relationship between the traffic speed and flow, then estimate the speed accurately. Extensive experiments have been performed to evaluate the performances of the four algorithms: polynomial fitting algorithm, BP neural networks, SVR and MKL-SVR. The experimental results show that MKL-SVR has the best and most robust performances.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124254384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425300
D. Chang
The combination of multiple-input multiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM) has been adopted as the next-generation wireless LAN technology. In this paper, we consider the design of a 2×2 space-time block coded (STBC) MIMO-OFDM baseband receiver with different carrier frequency offsets between transmit antennas due to an antenna resistance match problem. We propose a new carrier frequency offset tracking algorithm to estimate the mismatch of carrier frequency offsets between two transmit antennas. As the carrier frequency mismatch is corrected at transmitters via the side information channel, the performance of the MIMO OFDM receiver can approach the result without carrier frequency offsets. The overall receiver is also designed on the Xilinx FPGA with an implementation loss of about 1.5 dB.
{"title":"The MIMO OFDM receiver with mismatched transmit carrier frequency offsets","authors":"D. Chang","doi":"10.1109/ITST.2012.6425300","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425300","url":null,"abstract":"The combination of multiple-input multiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM) has been adopted as the next-generation wireless LAN technology. In this paper, we consider the design of a 2×2 space-time block coded (STBC) MIMO-OFDM baseband receiver with different carrier frequency offsets between transmit antennas due to an antenna resistance match problem. We propose a new carrier frequency offset tracking algorithm to estimate the mismatch of carrier frequency offsets between two transmit antennas. As the carrier frequency mismatch is corrected at transmitters via the side information channel, the performance of the MIMO OFDM receiver can approach the result without carrier frequency offsets. The overall receiver is also designed on the Xilinx FPGA with an implementation loss of about 1.5 dB.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115116007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425238
N. P. Chandrasiri, Kazunari Nawa, Akira Ishii, Shuguang Li, Shigeyuki Yamabe, T. Hirasawa, Yoichi Sato, Y. Suda, Takeshi Matsumura, Koji Taguchi
Analysis of driving skill/driver state can be used in building driver support and infotainment systems that can be adapted to individual needs of a driver. In this paper we present a machine learning approach to analyzing driving maneuver skills of a driver that covers both longitudinal and lateral controls. The concept is to learn a driver model from sensor data that are related to driving environment, driving behavior and vehicle response. Once the model is built, driving skills of an unknown run can be classified automatically. In this paper, we demonstrate the feasibility of the proposed method for driving skill analysis based on a driving simulator experiment in a curve driving scene for both the full curve and curve segmented cases.
{"title":"Driving skill analysis using machine learning The full curve and curve segmented cases","authors":"N. P. Chandrasiri, Kazunari Nawa, Akira Ishii, Shuguang Li, Shigeyuki Yamabe, T. Hirasawa, Yoichi Sato, Y. Suda, Takeshi Matsumura, Koji Taguchi","doi":"10.1109/ITST.2012.6425238","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425238","url":null,"abstract":"Analysis of driving skill/driver state can be used in building driver support and infotainment systems that can be adapted to individual needs of a driver. In this paper we present a machine learning approach to analyzing driving maneuver skills of a driver that covers both longitudinal and lateral controls. The concept is to learn a driver model from sensor data that are related to driving environment, driving behavior and vehicle response. Once the model is built, driving skills of an unknown run can be classified automatically. In this paper, we demonstrate the feasibility of the proposed method for driving skill analysis based on a driving simulator experiment in a curve driving scene for both the full curve and curve segmented cases.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115464289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425288
Nesrine Benhassine, Emmanuel Thierry, J. Bonnin
The use of IP tunneling has incredibly increased during the last years. It is needed in some contexts such as IP-based ITS communication but implies overhead. This overhead can be reduced using some techniques as header compression. Among them, RoHC is the most advanced header compression standard wich support errorprone link. In this paper we describe our kernel implementation of an opensource RoHC library. We give the first performance results we obtained with our implementation and sketchup some of our future works.
{"title":"Efficient header compression implementation for IP-based ITS communications","authors":"Nesrine Benhassine, Emmanuel Thierry, J. Bonnin","doi":"10.1109/ITST.2012.6425288","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425288","url":null,"abstract":"The use of IP tunneling has incredibly increased during the last years. It is needed in some contexts such as IP-based ITS communication but implies overhead. This overhead can be reduced using some techniques as header compression. Among them, RoHC is the most advanced header compression standard wich support errorprone link. In this paper we describe our kernel implementation of an opensource RoHC library. We give the first performance results we obtained with our implementation and sketchup some of our future works.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121795797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425197
Yu-Chih Wei, Yi-Ming Chen
In VANETs, how to resistant from collusion attacks are still an open problem. There are more and more attentions in recent years for improving the trust management model to counter collusion attacks. In this paper, we first evaluate beacon based trust management system, BTM, and RSUs aided model, RaBTM, with different combination of collusion attacks. Both of these two systems aim to propagate message opinions quickly while thwart internal attackers in privacy-enhanced VANETs. To evaluate the reliability of these two systems under different combination of collusion attacks effectively, we conducted a set of simulations with colluding alteration attacks and bogus message attacks. The simulation results show that the RaBTM and BTM are highly resilient to collusion attacks and performs at least 15% better than comparison baseline.
{"title":"Evaluation of collusion resistance on trust management systems for VANETs","authors":"Yu-Chih Wei, Yi-Ming Chen","doi":"10.1109/ITST.2012.6425197","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425197","url":null,"abstract":"In VANETs, how to resistant from collusion attacks are still an open problem. There are more and more attentions in recent years for improving the trust management model to counter collusion attacks. In this paper, we first evaluate beacon based trust management system, BTM, and RSUs aided model, RaBTM, with different combination of collusion attacks. Both of these two systems aim to propagate message opinions quickly while thwart internal attackers in privacy-enhanced VANETs. To evaluate the reliability of these two systems under different combination of collusion attacks effectively, we conducted a set of simulations with colluding alteration attacks and bogus message attacks. The simulation results show that the RaBTM and BTM are highly resilient to collusion attacks and performs at least 15% better than comparison baseline.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128037756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425163
Jiun-Jie Chen, Bo-Reui Chen, S. Huang
The traditional brake booster utilizes the pressure difference between atmosphere and vacuum to provide auxiliary force for brake. For the conventional vehicle, the vacuum is generated by the internal combustion engine. In order to use the same brake booster on the electric vehicle, the vacuum has to be created by an electric vacuum pump. The control of the electric vacuum pump can be achieved by an electromechanical pressure sensor which detects the change of the vacuum chamber and activates the pump. However, there is some concern that this system is not safe because the driver can not be noticed when the pump or the sensor failed. Therefore, the new system architecture of the electric vacuum brake booster system was proposed in this paper. The electronic pressure sensor replaces the electromechanical pressure sensor in the original system; as a result, the pressure of the vacuum chamber can be fed back to the electronic control unit, which achieves more precise pressure control. The electronic control unit also monitors the power source and the current of the electric vacuum pump, which can give information about whether the auxiliary brake force is available. Besides, four fail-safe strategies are developed for ensuring that all the failures can be found and handled. The electronic control unit was implemented with a microprocessor, and the functions were validated in the bench test as well as in a prototype vehicle. The results indicate that the driver can be informed the conditions of the electric vacuum brake booster system so that the driver has no unexpected and dangerous situations.
{"title":"The failure modes study for the electric vacuum brake booster system","authors":"Jiun-Jie Chen, Bo-Reui Chen, S. Huang","doi":"10.1109/ITST.2012.6425163","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425163","url":null,"abstract":"The traditional brake booster utilizes the pressure difference between atmosphere and vacuum to provide auxiliary force for brake. For the conventional vehicle, the vacuum is generated by the internal combustion engine. In order to use the same brake booster on the electric vehicle, the vacuum has to be created by an electric vacuum pump. The control of the electric vacuum pump can be achieved by an electromechanical pressure sensor which detects the change of the vacuum chamber and activates the pump. However, there is some concern that this system is not safe because the driver can not be noticed when the pump or the sensor failed. Therefore, the new system architecture of the electric vacuum brake booster system was proposed in this paper. The electronic pressure sensor replaces the electromechanical pressure sensor in the original system; as a result, the pressure of the vacuum chamber can be fed back to the electronic control unit, which achieves more precise pressure control. The electronic control unit also monitors the power source and the current of the electric vacuum pump, which can give information about whether the auxiliary brake force is available. Besides, four fail-safe strategies are developed for ensuring that all the failures can be found and handled. The electronic control unit was implemented with a microprocessor, and the functions were validated in the bench test as well as in a prototype vehicle. The results indicate that the driver can be informed the conditions of the electric vacuum brake booster system so that the driver has no unexpected and dangerous situations.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121211478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425206
Sin-Der Lee, C. Tzeng, K. Shu
This work is concerned with the design analysis and experiment of a small boat-based auto-berthing control system. The autopilot system is implemented using an Internal Model Control (IMC) structure, in which the ship model parameters and the value of the IMC design parameter β are estimated from MATLAB/Simulink simulations performed using the data acquired from a series of real-world maneuvering trials performed using a small fiber reinforced plastic (FRP) boat. In the berthing stage, both the yaw angle and the sway distance are used as feedback signals to activate the bow and stern thrusters, and proper thrust allocation is employed to achieve smooth sideway movements towards the berthing wall. The experimental results revealed that the auto-berthing control system successfully mimics the actions of a human pilot in accomplishing the approach and berthing maneuvers of a small boat in a real-world harbor environment.
{"title":"Design and experiment of a small boat auto-berthing control system","authors":"Sin-Der Lee, C. Tzeng, K. Shu","doi":"10.1109/ITST.2012.6425206","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425206","url":null,"abstract":"This work is concerned with the design analysis and experiment of a small boat-based auto-berthing control system. The autopilot system is implemented using an Internal Model Control (IMC) structure, in which the ship model parameters and the value of the IMC design parameter β are estimated from MATLAB/Simulink simulations performed using the data acquired from a series of real-world maneuvering trials performed using a small fiber reinforced plastic (FRP) boat. In the berthing stage, both the yaw angle and the sway distance are used as feedback signals to activate the bow and stern thrusters, and proper thrust allocation is employed to achieve smooth sideway movements towards the berthing wall. The experimental results revealed that the auto-berthing control system successfully mimics the actions of a human pilot in accomplishing the approach and berthing maneuvers of a small boat in a real-world harbor environment.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122696040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425284
Wen-min Lin, Jia-Chin Lin, Yu Ting Sun
Orthogonal frequency division multiplexing (OFDM) is desirable technique of wireless communication. Subcarriers of OFDM signal are orthogonally used on the frequency spectrum, and can resist multipath effect characteristics. Recently, OFDM has been used widely in many kinds of communication standards. But the OFDM signal has a major disadvantage is high peak-to-average power ratio (PAPR), which can resulted in significant nonlinear distortion when the signal is operated through a nonlinear region of power amplifier, and induces the degradation of bit error rate (BER). The methods of PAPR reduction, selective mapping (SLM) is effective and uncomplicated. SLM is a linear operation, it doesn't destroyed the signal itself. The received signal can be demodulated perfectly at receiver. But SLM has a problem of the high computational complexity, in this paper, introduce a modified SLM. The technique uses the concept of partition into subcarriers, called a partial-sequence SLM (P-SLM), which considerably reduces the computational complexity with the similar performance of PAPR reduction compared with the conventional SLM scheme. The simulation results show that it achieves better performance of reduces the computational complexity than the conventional SLM scheme.
{"title":"Modified selective mapping technique for PAPR reduction in OFDM systems","authors":"Wen-min Lin, Jia-Chin Lin, Yu Ting Sun","doi":"10.1109/ITST.2012.6425284","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425284","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) is desirable technique of wireless communication. Subcarriers of OFDM signal are orthogonally used on the frequency spectrum, and can resist multipath effect characteristics. Recently, OFDM has been used widely in many kinds of communication standards. But the OFDM signal has a major disadvantage is high peak-to-average power ratio (PAPR), which can resulted in significant nonlinear distortion when the signal is operated through a nonlinear region of power amplifier, and induces the degradation of bit error rate (BER). The methods of PAPR reduction, selective mapping (SLM) is effective and uncomplicated. SLM is a linear operation, it doesn't destroyed the signal itself. The received signal can be demodulated perfectly at receiver. But SLM has a problem of the high computational complexity, in this paper, introduce a modified SLM. The technique uses the concept of partition into subcarriers, called a partial-sequence SLM (P-SLM), which considerably reduces the computational complexity with the similar performance of PAPR reduction compared with the conventional SLM scheme. The simulation results show that it achieves better performance of reduces the computational complexity than the conventional SLM scheme.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128128789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425301
Taiki Uga, T. Nagaosa, Daichi Kawashima
In this paper, we study an emergency earthquake warning system using mobile terminals with a built-in accelerometer. First, the earthquake warning system that uses mobile terminals such as smart phones as seismographs is proposed. When an earthquake occurs, the mobile terminals detect seismic wave using a built-in accelerometer. If the value of acceleration exceeds the threshold value, information of acceleration is transmitted to a server on each region. The server manages information that has been sent by mobile terminals, and presumes the seismic intensity and the hypocenter, and sends warning messages to user terminals around the server. Then we evaluate the server of the proposed system, and show the sending and receiving ability of warning messages.
{"title":"An emergency earthquake warning system using mobile terminals with a built-in accelerometer","authors":"Taiki Uga, T. Nagaosa, Daichi Kawashima","doi":"10.1109/ITST.2012.6425301","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425301","url":null,"abstract":"In this paper, we study an emergency earthquake warning system using mobile terminals with a built-in accelerometer. First, the earthquake warning system that uses mobile terminals such as smart phones as seismographs is proposed. When an earthquake occurs, the mobile terminals detect seismic wave using a built-in accelerometer. If the value of acceleration exceeds the threshold value, information of acceleration is transmitted to a server on each region. The server manages information that has been sent by mobile terminals, and presumes the seismic intensity and the hypocenter, and sends warning messages to user terminals around the server. Then we evaluate the server of the proposed system, and show the sending and receiving ability of warning messages.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130928114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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