Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425277
S. Katayama, Y. Takeda, T. Wada, Yong-Bok Choi, H. Okada
There have been an enormous number of victims by a number of disasters such as fires, earthquakes, terrorisms and chemical explosion around the world. In these disasters, it is very important to detect the occurrence of them as soon as possible, and evacuate people quickly. To cope with these issues, the authors are developing ERESS (Emergency Rescue Evacuation Support System). ERESS is based on Mobile Ad-hoc NETworks (MANET) and aims to reduce the number of victims in panic-type disasters. This system consists of new mobile terminals (handset size) with advanced disaster recognition algorithm and acquires sensor information such as acceleration, direction difference and walking steps. Collected information about them is used for detecting the occurrence of a disaster. However, until now, there is no suitable information spreading method for ERESS to collect their information effectively. In this paper we propose three information spreading methods which are suitable for ERESS. The proposed methods are a TTL (Time To Live) control, a transmission power control, and an integrated method using separated sectors. We show the validity of the proposed methods by computer simulations.
{"title":"Multi-hop information spreading methods for appropriate number of terminals in ERESS","authors":"S. Katayama, Y. Takeda, T. Wada, Yong-Bok Choi, H. Okada","doi":"10.1109/ITST.2012.6425277","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425277","url":null,"abstract":"There have been an enormous number of victims by a number of disasters such as fires, earthquakes, terrorisms and chemical explosion around the world. In these disasters, it is very important to detect the occurrence of them as soon as possible, and evacuate people quickly. To cope with these issues, the authors are developing ERESS (Emergency Rescue Evacuation Support System). ERESS is based on Mobile Ad-hoc NETworks (MANET) and aims to reduce the number of victims in panic-type disasters. This system consists of new mobile terminals (handset size) with advanced disaster recognition algorithm and acquires sensor information such as acceleration, direction difference and walking steps. Collected information about them is used for detecting the occurrence of a disaster. However, until now, there is no suitable information spreading method for ERESS to collect their information effectively. In this paper we propose three information spreading methods which are suitable for ERESS. The proposed methods are a TTL (Time To Live) control, a transmission power control, and an integrated method using separated sectors. We show the validity of the proposed methods by computer simulations.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"49 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":"116608819","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}
In order to reduce the transmission delay between the source vehicle and the destination vehicle, a Farthest-First forwarding algorithm (FF) algorithm is proposed in this paper to find dissemination paths with fewer hop counts, lower transmission delay, and fewer control packets. The proposed FF algorithm utilizes the general idea of the contention-based technique to choose the farthest vehicle from a sender to be a packet forwarder, which is decided by receivers themselves. In the FF algorithm, each receiver waits for a specific time period when a packet is received. The time period is calculated based on the distance between the sender vehicle and each receiver vehicle, and the waiting time period of the farthest vehicle is always less than other nearby vehicles. When the timer expires, farthest vehicle will first forwards the packet. Although the concept of FF algorithm similar to the greedy forwarding algorithm, the message exchanging for neighboring information maintenance in the proposed FF is unnecessary. Compare to the other mechanisms, the simulation results show that of using the proposed FF algorithm can reduce the transmission delay and fewer hop counts, significantly.
为了减少源车辆与目的车辆之间的传输延迟，本文提出了一种最远优先转发算法(far - st- first forwarding algorithm, FF)，以寻找跳数较少、传输延迟较低、控制数据包较少的传播路径。所提出的FF算法利用基于争用技术的一般思想，选择距离发送方最远的车辆作为数据包转发器，由接收方自己决定。在FF算法中，每个接收方在收到报文时都要等待一段时间。时间周期根据发送车辆与每辆接收车辆之间的距离计算，距离最远的车辆的等待时间总是小于附近的其他车辆。当定时器到期时，最远的车辆将首先转发数据包。虽然FF算法的概念类似于贪婪转发算法，但在该算法中，为了维护邻居信息而进行的消息交换是不必要的。与其他机制相比，仿真结果表明，采用该算法可以显著降低传输延迟和减少跳数。
{"title":"A farthest-first forwarding algorithm in VANETs","authors":"Chung-Ming Huang, Shih-Yang Lin, Shih-Hao Wang, Shih-Chin Hsu","doi":"10.1109/ITST.2012.6425296","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425296","url":null,"abstract":"In order to reduce the transmission delay between the source vehicle and the destination vehicle, a Farthest-First forwarding algorithm (FF) algorithm is proposed in this paper to find dissemination paths with fewer hop counts, lower transmission delay, and fewer control packets. The proposed FF algorithm utilizes the general idea of the contention-based technique to choose the farthest vehicle from a sender to be a packet forwarder, which is decided by receivers themselves. In the FF algorithm, each receiver waits for a specific time period when a packet is received. The time period is calculated based on the distance between the sender vehicle and each receiver vehicle, and the waiting time period of the farthest vehicle is always less than other nearby vehicles. When the timer expires, farthest vehicle will first forwards the packet. Although the concept of FF algorithm similar to the greedy forwarding algorithm, the message exchanging for neighboring information maintenance in the proposed FF is unnecessary. Compare to the other mechanisms, the simulation results show that of using the proposed FF algorithm can reduce the transmission delay and fewer hop counts, significantly.","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":"129055681","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.2012.6425236
Shun-Hung Chen, C. Hsu, S. Huang
In this paper, a sensor fusion scheme is employed to reduce positioning error of a vehicle since the GPS signal is fail. The vehicular information, such as position, heading direction, and velocity, can be obtained through GPS signal. Generally, the positioning accuracy of commercial GPS module is within the 3 meters, however, the GPS module may disconnect the signals from satellites since the vehicle is maneuvered under shelters, e.g. parking garage, tunnel, high dense urban, etc. Therefore, our proposed methodology is able to improve the estimation accuracy of vehicle position based on dead reckoning method. The first step, the Kalman filter is utilized to reject the noise of velocity measurement which is captured from gearbox and wheel speed sensor and also predict the velocity and displacement of vehicle in next sample time. The second step is to construct the displacement model of the vehicle by adopting ARMA model, which is able to estimate the state of vehicle. Digital map information which is applied to correct the positioning result of ARMA model is addressed in the last step. A real time experiment result of GPS signal lost in a tunnel is carried out to demonstrate the performance of our proposed method.
{"title":"Recursive estimation of vehicle position by using navigation sensor fusion","authors":"Shun-Hung Chen, C. Hsu, S. Huang","doi":"10.1109/ITST.2012.6425236","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425236","url":null,"abstract":"In this paper, a sensor fusion scheme is employed to reduce positioning error of a vehicle since the GPS signal is fail. The vehicular information, such as position, heading direction, and velocity, can be obtained through GPS signal. Generally, the positioning accuracy of commercial GPS module is within the 3 meters, however, the GPS module may disconnect the signals from satellites since the vehicle is maneuvered under shelters, e.g. parking garage, tunnel, high dense urban, etc. Therefore, our proposed methodology is able to improve the estimation accuracy of vehicle position based on dead reckoning method. The first step, the Kalman filter is utilized to reject the noise of velocity measurement which is captured from gearbox and wheel speed sensor and also predict the velocity and displacement of vehicle in next sample time. The second step is to construct the displacement model of the vehicle by adopting ARMA model, which is able to estimate the state of vehicle. Digital map information which is applied to correct the positioning result of ARMA model is addressed in the last step. A real time experiment result of GPS signal lost in a tunnel is carried out to demonstrate the performance of our proposed method.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"78 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":"130252759","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.2012.6425258
Han Su, Cheng-Hsuan Cho, Yi-Hong Chu, W. Chang
Aiming to provide the wireless communications in some critical situations such as the data exchange between vehicle to vehicle and vehicle to infrastructure, some dedicated short range communications(DSRC) have been developed, one of those technologies named Wireless Access in Vehicular Environments(WAVE) is a suite of wireless technology IEEE 1609-family based on the standard IEEE 802.11p, which is mainly developed for avoiding the vehicle crashes and traffic accidents. In this article, we propose a mechanism based on the DSRC/WAVE and some applications based on it to deliver the traffic information so that the drivers can receive the adequate information to drive smoothly and safely.
{"title":"A traffic information dissemination mechanism based on DSRC/WAVE and its applications","authors":"Han Su, Cheng-Hsuan Cho, Yi-Hong Chu, W. Chang","doi":"10.1109/ITST.2012.6425258","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425258","url":null,"abstract":"Aiming to provide the wireless communications in some critical situations such as the data exchange between vehicle to vehicle and vehicle to infrastructure, some dedicated short range communications(DSRC) have been developed, one of those technologies named Wireless Access in Vehicular Environments(WAVE) is a suite of wireless technology IEEE 1609-family based on the standard IEEE 802.11p, which is mainly developed for avoiding the vehicle crashes and traffic accidents. In this article, we propose a mechanism based on the DSRC/WAVE and some applications based on it to deliver the traffic information so that the drivers can receive the adequate information to drive smoothly and safely.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"85 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":"127886462","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.2012.6425210
S. Tenqchen, Francis Chang, Kluo-Yueh Chen, Dong-Ling Wu, Shin-Hshun Huang
This paper proposes a feasibility study of traveling time estimation with mutual comparison of cellular-based vehicle probe (CVP), GPS-based Vehicle Probe and vehicle detection (VD) technologies. The travel time estimation algorithms have been designed for VD, CVP, GVP and some case in EVP (ETC-based Vehicle Probe). We have compared the system performance outputs at National Highway #1, Fast way #66, local governmental road #1 at Taoyuan to Jong-Li, and Sun-Moon Lake area on specific continuous holiday or working days. The outcome of this research is to target a CVP deployment with a percentage rate of 1%, a sample interval of 10 seconds and transmission interval of 30 seconds. Such a system will accurately determine the locations of both incidents and the tail end of traffic jams. It can be used to estimate travel times with mutual comparisons for VD, CVP, GVP, and EVP especially on continuous holidays. If we select the total # of NLU (number of location update) is less than 100 at local road section, then the CVP has good condition at traveling time estimation.
{"title":"Feasibility of traveling time estimation with mutual comparison of CVP, GVP and VD technologies","authors":"S. Tenqchen, Francis Chang, Kluo-Yueh Chen, Dong-Ling Wu, Shin-Hshun Huang","doi":"10.1109/ITST.2012.6425210","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425210","url":null,"abstract":"This paper proposes a feasibility study of traveling time estimation with mutual comparison of cellular-based vehicle probe (CVP), GPS-based Vehicle Probe and vehicle detection (VD) technologies. The travel time estimation algorithms have been designed for VD, CVP, GVP and some case in EVP (ETC-based Vehicle Probe). We have compared the system performance outputs at National Highway #1, Fast way #66, local governmental road #1 at Taoyuan to Jong-Li, and Sun-Moon Lake area on specific continuous holiday or working days. The outcome of this research is to target a CVP deployment with a percentage rate of 1%, a sample interval of 10 seconds and transmission interval of 30 seconds. Such a system will accurately determine the locations of both incidents and the tail end of traffic jams. It can be used to estimate travel times with mutual comparisons for VD, CVP, GVP, and EVP especially on continuous holidays. If we select the total # of NLU (number of location update) is less than 100 at local road section, then the CVP has good condition at traveling time estimation.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"80 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":"121171800","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.2012.6425186
Shoma Hisaka, S. Kamijo
We have developed a dedicated onboard “sensor” utilizing wireless communication devices for collision avoidance around road intersections. The “sensor” estimates the positions of transmitters on traffic participants by comparing the strengths of signals received by four ZigBee receivers installed at the four corners of observing vehicle. In our previous work, the “sensor” was proposed as an alternative tool for collision avoidance around intersections. Herein, we extend our previous work by considering a road surface reflection model to improve the estimation accuracy. By using this model, we succeeded in reducing the error mismatches between the observed data and the calibration data of the estimation algorithm. The validity of the reflection model is verified via FDTD electro-magnetic wave propagating simulation. The proposed system will be realized on the basis of these enhancements. In addition to these improvements, we performed experiments at real intersection using customized vehicle. We report the basic evaluation of the experimental results in this paper.
{"title":"Road user positioning by RSSI combinations with pavement reflection at real intersection","authors":"Shoma Hisaka, S. Kamijo","doi":"10.1109/ITST.2012.6425186","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425186","url":null,"abstract":"We have developed a dedicated onboard “sensor” utilizing wireless communication devices for collision avoidance around road intersections. The “sensor” estimates the positions of transmitters on traffic participants by comparing the strengths of signals received by four ZigBee receivers installed at the four corners of observing vehicle. In our previous work, the “sensor” was proposed as an alternative tool for collision avoidance around intersections. Herein, we extend our previous work by considering a road surface reflection model to improve the estimation accuracy. By using this model, we succeeded in reducing the error mismatches between the observed data and the calibration data of the estimation algorithm. The validity of the reflection model is verified via FDTD electro-magnetic wave propagating simulation. The proposed system will be realized on the basis of these enhancements. In addition to these improvements, we performed experiments at real intersection using customized vehicle. We report the basic evaluation of the experimental results in this paper.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"12 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":"121194802","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.2012.6425181
Yao-Hua Chen, Chia-Pin Chen, Pei-Wei Hsu, Chunfan Wei, Wei-Min Cheng, Hsun-Lun Huang, Tai-Yuan Cheng, Albert Y. P. Chen
A transceiver architecture with multi-core software-defined radio (SDR) technology is proposed for the physical layer inner processing of IEEE 802.11p in intelligent transportation systems (ITS). By localizing the data transmissions between the adjacent digital signal processors (DSP), concatenate memories and concatenate buses are introduced to ease the bandwidth requirement for the data communication among multicores. The proposed transceiver architecture is verified by the electronic system-level (ESL) virtual platform with two application-specific instruction-set processors (ASIP). The high level power estimation results are also provided in this paper. To enhance of the channel estimation and equalization performance of IEEE 802.11p, the capability of the proposed architecture with the decision feedback algorithm is analyzed.
{"title":"A novel multicore SDR architecture for smart vehicle systems","authors":"Yao-Hua Chen, Chia-Pin Chen, Pei-Wei Hsu, Chunfan Wei, Wei-Min Cheng, Hsun-Lun Huang, Tai-Yuan Cheng, Albert Y. P. Chen","doi":"10.1109/ITST.2012.6425181","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425181","url":null,"abstract":"A transceiver architecture with multi-core software-defined radio (SDR) technology is proposed for the physical layer inner processing of IEEE 802.11p in intelligent transportation systems (ITS). By localizing the data transmissions between the adjacent digital signal processors (DSP), concatenate memories and concatenate buses are introduced to ease the bandwidth requirement for the data communication among multicores. The proposed transceiver architecture is verified by the electronic system-level (ESL) virtual platform with two application-specific instruction-set processors (ASIP). The high level power estimation results are also provided in this paper. To enhance of the channel estimation and equalization performance of IEEE 802.11p, the capability of the proposed architecture with the decision feedback algorithm is analyzed.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"82 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":"115754351","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.2012.6425281
Yih-min Chen, Hsin-Yin Wu, Mong-Yo Lu
Orthogonal frequency-division multiplexing (OFDM) is an effective technique to cope with frequency-selective fading channels in broadband wireless communications. The performance of this technique depends mainly on the accuracy in channel frequency response (CFR) estimation. Most high performance channel estimation schemes exploit the correlation of the CFRs of subchannels which rely on the knowledge of channel statistics. There are also some model-based methods which are relatively simple in implementation and less dependent of the CFR correlation. However, the proposed model-based methods, applicable to OFDM systems with periodic training blocks, are less spectrally efficient comparing to those with scattered pilots. In this work, we consider the scenario of the OFDM systems with scattered pilots, the model-based method is modified and incorporated with a decision-directed feedback procedure. The proposed scheme achieves improved performance comparing to the traditional model-based methods using scattered pilots. A uncoded BER performance less 0.5 dB away from the ideal CFR performance is demonstrated when DVB-T is considered as the example OFDM system.
{"title":"Decision-directed polynomial model-based channel estimation for OFDM systems with scattered-pilots","authors":"Yih-min Chen, Hsin-Yin Wu, Mong-Yo Lu","doi":"10.1109/ITST.2012.6425281","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425281","url":null,"abstract":"Orthogonal frequency-division multiplexing (OFDM) is an effective technique to cope with frequency-selective fading channels in broadband wireless communications. The performance of this technique depends mainly on the accuracy in channel frequency response (CFR) estimation. Most high performance channel estimation schemes exploit the correlation of the CFRs of subchannels which rely on the knowledge of channel statistics. There are also some model-based methods which are relatively simple in implementation and less dependent of the CFR correlation. However, the proposed model-based methods, applicable to OFDM systems with periodic training blocks, are less spectrally efficient comparing to those with scattered pilots. In this work, we consider the scenario of the OFDM systems with scattered pilots, the model-based method is modified and incorporated with a decision-directed feedback procedure. The proposed scheme achieves improved performance comparing to the traditional model-based methods using scattered pilots. A uncoded BER performance less 0.5 dB away from the ideal CFR performance is demonstrated when DVB-T is considered as the example OFDM system.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"164 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":"115765078","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.2012.6425271
J. Sheu, Wei-Kai Hu, Rodolfo Eduardo Bol
Hybrid vehicular ad hoc networks (VANETs) allow Inter-Vehicle Communications and Roadside-to-Vehicle Communications. The proposed protocol utilizes the Roadside Units (RSUs) for the implementation of a registration process which allows for the provision of a localization service. The presented RSUs architecture breaks the VANETs into smaller regions managed by a RSU in which individual On Board Units (OBUs) register providing its current position and velocity vectors. Using the data provided by the OBUs, a localization service can be implemented. When the source need to send data, the location of the destination is calculated at the source RSU and the destination RSU using controlled flooding locates the destination vehicle and establishes a route path between source and destination. Simulation results show that it performs well providing good throughput, high packet delivery ration, low delivery delays with very low overhead.
{"title":"A registration system for aiding in localization and routing in hybrid VANETs","authors":"J. Sheu, Wei-Kai Hu, Rodolfo Eduardo Bol","doi":"10.1109/ITST.2012.6425271","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425271","url":null,"abstract":"Hybrid vehicular ad hoc networks (VANETs) allow Inter-Vehicle Communications and Roadside-to-Vehicle Communications. The proposed protocol utilizes the Roadside Units (RSUs) for the implementation of a registration process which allows for the provision of a localization service. The presented RSUs architecture breaks the VANETs into smaller regions managed by a RSU in which individual On Board Units (OBUs) register providing its current position and velocity vectors. Using the data provided by the OBUs, a localization service can be implemented. When the source need to send data, the location of the destination is calculated at the source RSU and the destination RSU using controlled flooding locates the destination vehicle and establishes a route path between source and destination. Simulation results show that it performs well providing good throughput, high packet delivery ration, low delivery delays with very low overhead.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"16 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":"126647395","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.2012.6425225
Jingjing Chi, Jian Huang, Bowen Du
Traffic in the megacity has characteristics of high vehicle density, small space between vehicles, which results in a greater distress to the vehicle identification and statistics. This paper designs and implements a vehicle identification algorithm based on edge detection and symmetry. The algorithm can meet the basic needs of urban traffic statistics, and overcome the influence of external factors such as inclement weather. At the end of the paper, some experiments are taken to verify that this method made a great classification accuracy of 94% under good weather and 86% at rainy day.
{"title":"The identification of traffic flow based on edge symmetry","authors":"Jingjing Chi, Jian Huang, Bowen Du","doi":"10.1109/ITST.2012.6425225","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425225","url":null,"abstract":"Traffic in the megacity has characteristics of high vehicle density, small space between vehicles, which results in a greater distress to the vehicle identification and statistics. This paper designs and implements a vehicle identification algorithm based on edge detection and symmetry. The algorithm can meet the basic needs of urban traffic statistics, and overcome the influence of external factors such as inclement weather. At the end of the paper, some experiments are taken to verify that this method made a great classification accuracy of 94% under good weather and 86% at rainy day.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"30 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":"126161498","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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