Pub Date : 2012-11-01DOI: 10.1109/ITST.2012.6425204
Dah-Jing Jwo, C. Chuang, Jingyu Yang, Yu-He Lu
In GPS/INS integration, the ultra-tightly coupled approach involves the integration of I (in-phase) and Q (quadrature) components from the correlator of a GPS receiver with the INS data. The principal advantages of the Ultra Tightly Couple (UTC) structure is that a Doppler frequency derived from the INS is integrated with the tracking loops to improve the receiver tracking capability. The Doppler frequency shift is calculated and fed to the GPS tracking loops for elimination of the effect of stochastic errors caused by the Doppler frequency. The navigation information from INS can be converted into the Doppler information, which can be integrated with the GPS tracking loops to mitigate the Doppler on the GPS signal, resulting in the threshold improvement, thereby improving the overall system performance. An algorithm for bridging GPS outages using the radial basis function neural network (RBFNN) and Adaptive Network-Based Fuzzy Inference System (ANFIS) for providing better prediction of Doppler residual between GPS and prediction in order to maintain regular operation of the navigation system. The results demonstrate that the UTC with the assist of neural network can effectively improve the system robustness during GPS outages.
{"title":"Neural network assisted ultra-tightly coupled GPS/INS integration for seamless navigation","authors":"Dah-Jing Jwo, C. Chuang, Jingyu Yang, Yu-He Lu","doi":"10.1109/ITST.2012.6425204","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425204","url":null,"abstract":"In GPS/INS integration, the ultra-tightly coupled approach involves the integration of I (in-phase) and Q (quadrature) components from the correlator of a GPS receiver with the INS data. The principal advantages of the Ultra Tightly Couple (UTC) structure is that a Doppler frequency derived from the INS is integrated with the tracking loops to improve the receiver tracking capability. The Doppler frequency shift is calculated and fed to the GPS tracking loops for elimination of the effect of stochastic errors caused by the Doppler frequency. The navigation information from INS can be converted into the Doppler information, which can be integrated with the GPS tracking loops to mitigate the Doppler on the GPS signal, resulting in the threshold improvement, thereby improving the overall system performance. An algorithm for bridging GPS outages using the radial basis function neural network (RBFNN) and Adaptive Network-Based Fuzzy Inference System (ANFIS) for providing better prediction of Doppler residual between GPS and prediction in order to maintain regular operation of the navigation system. The results demonstrate that the UTC with the assist of neural network can effectively improve the system robustness during GPS outages.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"33 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":"116446645","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.2012.6425283
Guey-Yun Chang, Dar-Wei Chiou
In wireless sensor network (WSN), location information is required to achieve the goal in many applications. Most of existing localization algorithms for mobile sensor networks are based on the Sequential Monte Carlo (SMC) method. SMC-based methods has either high localization error in low-anchor density environments or high communication cost. In this paper, we propose a non-SMC-based distributed localization scheme. Our main idea comes from the observation that a sensor node which hears another node for a sufficiently long time has trajectory similar to the heard node's trajectory. Simulation shows that our scheme has low localization error, low communication cost, and low computation cost.
{"title":"Localization algorithm for mobile sensor networks under the random walk model","authors":"Guey-Yun Chang, Dar-Wei Chiou","doi":"10.1109/ITST.2012.6425283","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425283","url":null,"abstract":"In wireless sensor network (WSN), location information is required to achieve the goal in many applications. Most of existing localization algorithms for mobile sensor networks are based on the Sequential Monte Carlo (SMC) method. SMC-based methods has either high localization error in low-anchor density environments or high communication cost. In this paper, we propose a non-SMC-based distributed localization scheme. Our main idea comes from the observation that a sensor node which hears another node for a sufficiently long time has trajectory similar to the heard node's trajectory. Simulation shows that our scheme has low localization error, low communication cost, and low computation cost.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"608 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":"133276058","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.2012.6425187
A. Alonso, C. Mecklenbräuker
Traffic safety-related messages have to meet low and predictable delay constraints. For vehicles using IEEE802.11p medium access control (MAC) algorithm the channel access delay increases unpredictably (using random backoff time) every time the channel is sensed busy. In contrast, Self-Organizing Time Division Multiple Access (STDMA) provides an upper bound on channel access delay defined by the selection interval (SI) length. Our contribution studies the performance of both protocols during the start-up phase of the vehicular ad-hoc network (VANET). Results show MAC-to-MAC delay of each correctly decoded packet for lightly-loaded and heavily-loaded scenarios. The cumulative distribution function (CDF) of these measurements for a maximum observable MAC-to-MAC delay value of 100ms for different vehicle densities show that both MAC algorithms perform reliably (above 90%) within 60s simulation. We define stabilization time as the time instant from which on the MAC protocol reaches a reliable performance. For lightly-loaded scenarios with 25 vehicles within range, STDMA and the IEEE802.11p MAC algorithm have a stabilization time of 1s and 20ms, respectively. For heavily-loaded scenarios with 400 vehicles within range, STDMA and the IEEE802.11p MAC algorithm have a stabilization time of 1s and 3.2s. In conclusion, STDMA shows a reliable performance and better predictability, regardless of the number of vehicles accessing the channel, and it also provides lower stabilization time in comparison to IEEE802.11p MAC algorithm for vehicle densities higher than 350 vehicles sending periodic messages every 500ms.
{"title":"Stabilization time comparison of CSMA and Self-Organizing TDMA for different channel loads in VANETS","authors":"A. Alonso, C. Mecklenbräuker","doi":"10.1109/ITST.2012.6425187","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425187","url":null,"abstract":"Traffic safety-related messages have to meet low and predictable delay constraints. For vehicles using IEEE802.11p medium access control (MAC) algorithm the channel access delay increases unpredictably (using random backoff time) every time the channel is sensed busy. In contrast, Self-Organizing Time Division Multiple Access (STDMA) provides an upper bound on channel access delay defined by the selection interval (SI) length. Our contribution studies the performance of both protocols during the start-up phase of the vehicular ad-hoc network (VANET). Results show MAC-to-MAC delay of each correctly decoded packet for lightly-loaded and heavily-loaded scenarios. The cumulative distribution function (CDF) of these measurements for a maximum observable MAC-to-MAC delay value of 100ms for different vehicle densities show that both MAC algorithms perform reliably (above 90%) within 60s simulation. We define stabilization time as the time instant from which on the MAC protocol reaches a reliable performance. For lightly-loaded scenarios with 25 vehicles within range, STDMA and the IEEE802.11p MAC algorithm have a stabilization time of 1s and 20ms, respectively. For heavily-loaded scenarios with 400 vehicles within range, STDMA and the IEEE802.11p MAC algorithm have a stabilization time of 1s and 3.2s. In conclusion, STDMA shows a reliable performance and better predictability, regardless of the number of vehicles accessing the channel, and it also provides lower stabilization time in comparison to IEEE802.11p MAC algorithm for vehicle densities higher than 350 vehicles sending periodic messages every 500ms.","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":"130368699","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.2012.6425307
X. Shen, Rongqing Zhang, Xiang Cheng, Yang Yang, B. Jiao
There are various applications with different Quality of Service (QoS) requirements and transmission priorities in the IEEE 802.11p vehicular network. It is more important to ensure the successful transmission for the high priority traffic compared with the low priority traffic, especially in congested networks. Based on such consideration, this paper proposes a novel distributed multi-priority congestion control approach for the IEEE 802.11p vehicular network, where four traffic categories with different transmission priorities are configured. In the proposed congestion control approach, each access category queue in a vehicle periodically measures the congestion condition with the local transmission information, including the queue length and the amount of failure transmissions. When the measured congestion condition is over the congestion threshold, the minimum contention window size is increased to reduce the channel load. For the lower priority traffic, a smaller congestion threshold is set to guarantee the performance of the higher priority traffic. Compared with the IEEE 802.11p, the proposed approach can ensure the successful transmission for the highest priority traffic flow and make the collision probability remain at a low level in the dense network.
{"title":"Distributed multi-priority congestion control approach for IEEE 802.11p vehicular networks","authors":"X. Shen, Rongqing Zhang, Xiang Cheng, Yang Yang, B. Jiao","doi":"10.1109/ITST.2012.6425307","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425307","url":null,"abstract":"There are various applications with different Quality of Service (QoS) requirements and transmission priorities in the IEEE 802.11p vehicular network. It is more important to ensure the successful transmission for the high priority traffic compared with the low priority traffic, especially in congested networks. Based on such consideration, this paper proposes a novel distributed multi-priority congestion control approach for the IEEE 802.11p vehicular network, where four traffic categories with different transmission priorities are configured. In the proposed congestion control approach, each access category queue in a vehicle periodically measures the congestion condition with the local transmission information, including the queue length and the amount of failure transmissions. When the measured congestion condition is over the congestion threshold, the minimum contention window size is increased to reduce the channel load. For the lower priority traffic, a smaller congestion threshold is set to guarantee the performance of the higher priority traffic. Compared with the IEEE 802.11p, the proposed approach can ensure the successful transmission for the highest priority traffic flow and make the collision probability remain at a low level in the dense network.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"7 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":"129236155","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.2012.6425239
K. Revsbech, T. Madsen, H. Schiøler
Validating safety-critical real-time systems such as in-car networks often involves a model-based performance analysis of the network. An important issue performing such analysis is to provide precise model parameters, matching the actual equipment. One way to obtain such parameters is to derive them by measurements of the equipment. In this work we describe the design of a testbed enabling active measurements on up to 1 [Gb/Sec] Copper based Ethernet Switches. By use of the testbed it self, we conduct a series of tests where the precision of the testbed is estimated. We find a maximum error of ±55 [ns] measuring frame traversal time, and quantify the constant error imposed by the testbed it self.
{"title":"High precision testbed to evaluate ethernet performance for in-car networks","authors":"K. Revsbech, T. Madsen, H. Schiøler","doi":"10.1109/ITST.2012.6425239","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425239","url":null,"abstract":"Validating safety-critical real-time systems such as in-car networks often involves a model-based performance analysis of the network. An important issue performing such analysis is to provide precise model parameters, matching the actual equipment. One way to obtain such parameters is to derive them by measurements of the equipment. In this work we describe the design of a testbed enabling active measurements on up to 1 [Gb/Sec] Copper based Ethernet Switches. By use of the testbed it self, we conduct a series of tests where the precision of the testbed is estimated. We find a maximum error of ±55 [ns] measuring frame traversal time, and quantify the constant error imposed by the testbed it self.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"83 s57","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120854687","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.2012.6425146
J. C. Hung, A. Lee, T. Shih
Now, almost everyone has access to a mobile device, and with latest generation mobile devices the possibilities for offering new information services are endless. However, the existing navigation systems providing services and information on the city's traffic are not real-time, complete and the localized information may be not “customized” enough. Moreover, the services should be more user friendly, more efficiently and dynamic. Therefore, in this paper we present a Customized Navigation Systems with Mobile Devices of Public Transport based on our life. To accomplish these goals, our systems separate three sub-systems to implementation. The systems open up new opportunities for delivering quality public transport services, achieve minimize the passengers' cost, and user can tag or write note in map creating a own map, providing location-based services for users to help those in unfamiliar areas and real-time updates and improve operational practice; they contribute towards “greener travel choices” by making public transport easier to understand and therefore more convenient.
{"title":"Customized Navigation Systems with the Mobile Devices of Public Transport","authors":"J. C. Hung, A. Lee, T. Shih","doi":"10.1109/ITST.2012.6425146","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425146","url":null,"abstract":"Now, almost everyone has access to a mobile device, and with latest generation mobile devices the possibilities for offering new information services are endless. However, the existing navigation systems providing services and information on the city's traffic are not real-time, complete and the localized information may be not “customized” enough. Moreover, the services should be more user friendly, more efficiently and dynamic. Therefore, in this paper we present a Customized Navigation Systems with Mobile Devices of Public Transport based on our life. To accomplish these goals, our systems separate three sub-systems to implementation. The systems open up new opportunities for delivering quality public transport services, achieve minimize the passengers' cost, and user can tag or write note in map creating a own map, providing location-based services for users to help those in unfamiliar areas and real-time updates and improve operational practice; they contribute towards “greener travel choices” by making public transport easier to understand and therefore more convenient.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"5 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":"121217792","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.2012.6425235
Shih-Hau Fang, Wei-Chia Lai, Chih-Ming Lee
Cloud-based positioning provides better support for resource-constrained mobile devices; however, the user's location information is exposed during positioning when the computation is performed on the cloud. The improper exposure of location information could result in severe consequences that make users the target of fraudulent attacks. This study proposes a privacy-preserving localization scheme based on homomorphic encryption techniques in order to protect user privacy from both imminent attackers and untrusted cloud servers. The proposed algorithm exposes unreliable cloud only an encrypted version of the measurements and allows positioning to be performed in an encrypted domain. This scheme prevents cloud servers from understanding the computed results and avoid an adversary monitoring the transmission to log user behavior. On-site experiments show the feasibility of our approach. The results show that positioning in an encrypted domain would not affect accuracy. Experimental results also show that the proposed algorithm requires less computational overhead and achieves higher privacy level simultaneously compared to traditional encryption approaches.
{"title":"Privacy considerations for cloud-based positioning","authors":"Shih-Hau Fang, Wei-Chia Lai, Chih-Ming Lee","doi":"10.1109/ITST.2012.6425235","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425235","url":null,"abstract":"Cloud-based positioning provides better support for resource-constrained mobile devices; however, the user's location information is exposed during positioning when the computation is performed on the cloud. The improper exposure of location information could result in severe consequences that make users the target of fraudulent attacks. This study proposes a privacy-preserving localization scheme based on homomorphic encryption techniques in order to protect user privacy from both imminent attackers and untrusted cloud servers. The proposed algorithm exposes unreliable cloud only an encrypted version of the measurements and allows positioning to be performed in an encrypted domain. This scheme prevents cloud servers from understanding the computed results and avoid an adversary monitoring the transmission to log user behavior. On-site experiments show the feasibility of our approach. The results show that positioning in an encrypted domain would not affect accuracy. Experimental results also show that the proposed algorithm requires less computational overhead and achieves higher privacy level simultaneously compared to traditional encryption approaches.","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":"128356121","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.2012.6425245
Chien-Ming Chou, Kun-Chan Lan
Node mobility in a vehicular network is strongly affected by the driving behavior such as route choices. While route choice models have been extensively studied in the transportation community, as far as we know, the effects of preferred route on vehicular network simulations have not been discussed much in the networking literature. In this work, we set out to understand the effect of different parameters such as route choices, traffic lights, RSU locations on the formation of vehicle clusters. We also show how the dynamic of vehicle clusters change over time using real-world traces.
{"title":"On the formation of vehicle clusters","authors":"Chien-Ming Chou, Kun-Chan Lan","doi":"10.1109/ITST.2012.6425245","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425245","url":null,"abstract":"Node mobility in a vehicular network is strongly affected by the driving behavior such as route choices. While route choice models have been extensively studied in the transportation community, as far as we know, the effects of preferred route on vehicular network simulations have not been discussed much in the networking literature. In this work, we set out to understand the effect of different parameters such as route choices, traffic lights, RSU locations on the formation of vehicle clusters. We also show how the dynamic of vehicle clusters change over time using real-world traces.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"29 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":"131760224","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.2012.6425160
H. Bogucka
In this paper, the design concept for mobile radio communications is presented with crucial trade-offs between system performance and energy-consumption. The system performance, depends on various adaptive procedures and parameters adopted at multiple OSI layers of a communication system. However these procedures and parameters require spectrum and energy resources and contribute to the overall system and network energy-consumption and to the resulting CO2 emission. In this paper, a vision on green mobile communication technology is presented, and some trade-offs among different methodologies toward energy-efficient system-design are considered. Below, we discuss the degrees of freedom in the design of communications systems and networks using various technologies, and investigate their energy-saving options.
{"title":"Holistic approach to future green mobile communications","authors":"H. Bogucka","doi":"10.1109/ITST.2012.6425160","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425160","url":null,"abstract":"In this paper, the design concept for mobile radio communications is presented with crucial trade-offs between system performance and energy-consumption. The system performance, depends on various adaptive procedures and parameters adopted at multiple OSI layers of a communication system. However these procedures and parameters require spectrum and energy resources and contribute to the overall system and network energy-consumption and to the resulting CO2 emission. In this paper, a vision on green mobile communication technology is presented, and some trade-offs among different methodologies toward energy-efficient system-design are considered. Below, we discuss the degrees of freedom in the design of communications systems and networks using various technologies, and investigate their energy-saving options.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"41 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":"126887464","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.2012.6425267
K. Shibata, Kunimitsu Fujita, Y. Horita
Increase of people who use public transportation, it is possible to realize an environment-friendly society. In order to promote the use of public transportation, we try to reduce the waiting time at the station. We propose a system that informs the current location of the tram by using smartphone. In addition, we also propose a navigation system of the shortest walking route to the tram station. For evaluating the usefulness of this system, we performed a demonstration experiment on an actual LRT system in the center of Toyama city. We conducted our investigation by questionnaire. From the results, we found the effectiveness and problems of the system.
{"title":"Assessment of tram location and route navigation system in Toyama light rail transit","authors":"K. Shibata, Kunimitsu Fujita, Y. Horita","doi":"10.1109/ITST.2012.6425267","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425267","url":null,"abstract":"Increase of people who use public transportation, it is possible to realize an environment-friendly society. In order to promote the use of public transportation, we try to reduce the waiting time at the station. We propose a system that informs the current location of the tram by using smartphone. In addition, we also propose a navigation system of the shortest walking route to the tram station. For evaluating the usefulness of this system, we performed a demonstration experiment on an actual LRT system in the center of Toyama city. We conducted our investigation by questionnaire. From the results, we found the effectiveness and problems of the system.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"13 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":"124226544","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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