Pub Date : 2012-12-01DOI: 10.1109/ITST.2012.6425220
Yuichiro Koga, C. Sugimoto, R. Kohno
The ad-hoc network is paid to attention aiming at the achievement of the ubiquitous society. In ad-hoc network, multi-hop communication is used and source node constructs routes to destination. Applications of ad-hoc network are inter-vehicle communication and sensor network and so on. Among them, wireless sensor network is attractive in an emergency such as disasters. In this application, one of the problems is congestion for increasing of traffic of the urgent and medical data packets on wireless communication routes. It is a problem to be solved to guarantee quality of service in ad-hoc network in an emergency. In this paper, we pay attention to congestion and propose the protocol to improve transmission delay for ad-hoc network in an emergency. The main routes (the shortest routes) are constructed by using a proactive routing protocol, OLSR (Optimized Link State Routing)[1], in this paper because of this premise, the network topology is no change and heavy traffic. And, the alternative routes are constructed by using a reactive routing protocol, AODV (Ad hoc On-demand Distance Vector)[2], when a node receive a control packet of congestion acknowledge from congestion node. Therefore, it is avoided to overlap of main routes and reduce delay and packet loss. Additionally, data packets are given priority level and the low priority packet uses the alternative route. As a result, the high priority packet such as the urgent and medical data is transmitted low delay and packet loss. We evaluate transmission delay by congestion to preparing conventional protocol OLSR.
为了实现泛在社会的目标，自组织网络受到了人们的关注。在ad-hoc网络中，采用多跳通信，源节点建立到目的节点的路由。自组网的应用有车际通信、传感器网络等。其中，无线传感器网络在灾害等突发事件中具有很大的吸引力。在此应用中，由于紧急和医疗数据分组在无线通信路由上的流量不断增加，造成了拥塞问题。在紧急情况下，如何保证自组网的服务质量是一个亟待解决的问题。本文从拥塞问题出发，提出了一种改进紧急情况下ad-hoc网络传输延迟的协议。主路由(最短的路由)采用主动路由协议OLSR (Optimized Link State routing)[1]构建，本文正是因为这样的前提下，网络拓扑结构没有变化且流量大。当节点接收到来自拥塞节点的拥塞确认控制包时，使用响应路由协议AODV (Ad hoc On-demand Distance Vector)[2]构建备选路由。这样可以避免主路由重叠，减少时延和丢包。此外，数据包被赋予优先级，低优先级的数据包使用备用路由。因此，高优先级的数据包，如紧急和医疗数据传输的低延迟和丢包。我们通过拥塞来评估传输延迟，以准备传统协议的OLSR。
{"title":"Congestion control routing protocol using priority Control for ad-hoc networks in an emergency","authors":"Yuichiro Koga, C. Sugimoto, R. Kohno","doi":"10.1109/ITST.2012.6425220","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425220","url":null,"abstract":"The ad-hoc network is paid to attention aiming at the achievement of the ubiquitous society. In ad-hoc network, multi-hop communication is used and source node constructs routes to destination. Applications of ad-hoc network are inter-vehicle communication and sensor network and so on. Among them, wireless sensor network is attractive in an emergency such as disasters. In this application, one of the problems is congestion for increasing of traffic of the urgent and medical data packets on wireless communication routes. It is a problem to be solved to guarantee quality of service in ad-hoc network in an emergency. In this paper, we pay attention to congestion and propose the protocol to improve transmission delay for ad-hoc network in an emergency. The main routes (the shortest routes) are constructed by using a proactive routing protocol, OLSR (Optimized Link State Routing)[1], in this paper because of this premise, the network topology is no change and heavy traffic. And, the alternative routes are constructed by using a reactive routing protocol, AODV (Ad hoc On-demand Distance Vector)[2], when a node receive a control packet of congestion acknowledge from congestion node. Therefore, it is avoided to overlap of main routes and reduce delay and packet loss. Additionally, data packets are given priority level and the low priority packet uses the alternative route. As a result, the high priority packet such as the urgent and medical data is transmitted low delay and packet loss. We evaluate transmission delay by congestion to preparing conventional protocol OLSR.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122084950","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 : 2012-12-01DOI: 10.1109/ITST.2012.6425262
Chien-Ming Chou, Kun-Chan Lan, Chen-Yuan Li
A multi-homed Network Mobility (NEMO) architecture has been proposed previously to improve the reliability and aggregate the bandwidth of Mobile Router (MR) by simultaneously using multiple wireless links. In this paper, we discuss some potential issues that could affect the performance of TCP traffic in a multi-homed architecture. In addition, we propose a protocol to improve the performance of sending a single TCP connection over multiple wireless links on a MR. Our protocol consists of three components. First, we use a reordering buffer to eliminate unnecessary retransmission caused by out-of-order packets. Second, we develop a Multi-homed Split Connection mechanism to enable the TCP connection to quickly adapt to the conditions of multiple links when packet loss occurs. Finally, a Scheduled Window-based Transmission Control algorithm is proposed to mitigate the negative effects of out-of-order packets in the case of using heterogeneous links in a multi-homed environment. We evaluate the performance of our protocol by comparing it with the Concurrent Multi-path Transfer SCTP (CMT-SCTP) and show that it can resolve several performance issues.
{"title":"Resolving TCP re-ordering issues on a multi-homed NEMO-based network","authors":"Chien-Ming Chou, Kun-Chan Lan, Chen-Yuan Li","doi":"10.1109/ITST.2012.6425262","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425262","url":null,"abstract":"A multi-homed Network Mobility (NEMO) architecture has been proposed previously to improve the reliability and aggregate the bandwidth of Mobile Router (MR) by simultaneously using multiple wireless links. In this paper, we discuss some potential issues that could affect the performance of TCP traffic in a multi-homed architecture. In addition, we propose a protocol to improve the performance of sending a single TCP connection over multiple wireless links on a MR. Our protocol consists of three components. First, we use a reordering buffer to eliminate unnecessary retransmission caused by out-of-order packets. Second, we develop a Multi-homed Split Connection mechanism to enable the TCP connection to quickly adapt to the conditions of multiple links when packet loss occurs. Finally, a Scheduled Window-based Transmission Control algorithm is proposed to mitigate the negative effects of out-of-order packets in the case of using heterogeneous links in a multi-homed environment. We evaluate the performance of our protocol by comparing it with the Concurrent Multi-path Transfer SCTP (CMT-SCTP) and show that it can resolve several performance issues.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132879954","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 : 2012-12-01DOI: 10.1109/ITST.2012.6425148
Shou-Ren Hu, Han-Tsung Liou
To implement an adequate adaptive traffic signal control strategy, one of the critical components is the reliable estimates of intersection turning proportions. However, in practice link traffic counts are not sufficient to provide desirable turning proportion estimates at an intersection due to the underdetermined problem and it needs to further consider other auxiliary data sources to improve the estimation accuracy. Based on a traffic flow model, a nonlinear least squares estimate model is proposed to integrate link flow information from vehicle detectors (VDs) and partial turning flow information from video sensors to solve the turning proportion estimation problem. Using the simulation tool, DYNASMART-P, as a test platform, the test results indicate that heterogeneous data resources are better than single source, and this framework has potentials to feedback to an on/off-line adaptive traffic signal control.
{"title":"Estimation of time-dependent intersection turning proportions for urban signal controls","authors":"Shou-Ren Hu, Han-Tsung Liou","doi":"10.1109/ITST.2012.6425148","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425148","url":null,"abstract":"To implement an adequate adaptive traffic signal control strategy, one of the critical components is the reliable estimates of intersection turning proportions. However, in practice link traffic counts are not sufficient to provide desirable turning proportion estimates at an intersection due to the underdetermined problem and it needs to further consider other auxiliary data sources to improve the estimation accuracy. Based on a traffic flow model, a nonlinear least squares estimate model is proposed to integrate link flow information from vehicle detectors (VDs) and partial turning flow information from video sensors to solve the turning proportion estimation problem. Using the simulation tool, DYNASMART-P, as a test platform, the test results indicate that heterogeneous data resources are better than single source, and this framework has potentials to feedback to an on/off-line adaptive traffic signal control.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115623781","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 : 2012-12-01DOI: 10.1109/ITST.2012.6425224
Kevin P. Hwang, Wei-Hsun Lee, Wen-Bin Wu
Travel time information plays an important role in ITS, especially in advanced traveler information system (ATIS). Traditionally, travel time is predicted by a single data source, such as vehicle detectors (VD) or probing vehicles (PV). In this paper, we try to predict travel time by integrating these two data sources by a dynamic weighted fusion scheme. The weights of the data sources are dynamically determined by the distance weight scheme to enhance the prediction precision. The proposed TTP model is applied to a small traffic network located in the east and north district of Tainan City, Taiwan. VD data is provided by traffic bureau of Tainan city government and probing vehicles raw data is collected from a Taxi dispatching system. The experiment results show that dynamic weighted combination of these two data sources can enhance the precision of the TTP, and the prediction stability of the proposed model is better than both the single source TTP models (VD or PV).
{"title":"Travel time prediction by weighted fusion of probing vehicles and vehicle detectors data sources","authors":"Kevin P. Hwang, Wei-Hsun Lee, Wen-Bin Wu","doi":"10.1109/ITST.2012.6425224","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425224","url":null,"abstract":"Travel time information plays an important role in ITS, especially in advanced traveler information system (ATIS). Traditionally, travel time is predicted by a single data source, such as vehicle detectors (VD) or probing vehicles (PV). In this paper, we try to predict travel time by integrating these two data sources by a dynamic weighted fusion scheme. The weights of the data sources are dynamically determined by the distance weight scheme to enhance the prediction precision. The proposed TTP model is applied to a small traffic network located in the east and north district of Tainan City, Taiwan. VD data is provided by traffic bureau of Tainan city government and probing vehicles raw data is collected from a Taxi dispatching system. The experiment results show that dynamic weighted combination of these two data sources can enhance the precision of the TTP, and the prediction stability of the proposed model is better than both the single source TTP models (VD or PV).","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115265450","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 : 2012-12-01DOI: 10.1109/ITST.2012.6425226
Wei-Hsun Lee, Yan-Cheng Lai, Pei-Yin Chen
With the growing awareness on environmental protection, the reduction of fuel consumption and carbon dioxide (CO2) emission have been receiving considerable research interests. With the advances in vehicular ad-hoc network (VANET) technology, a green driving suggestion system is proposed to minimize the carbon emission by enhancing the intersection throughputs and providing drivers the best-economic driving suggestions. The idea of this work is to let the signal controllers (with built-in RSU) broadcast the signal countdown message and waiting queue information to the vehicles nearby the intersection, extending the range of drivers' visual contact to the signal. With these information, on-board unit (OBU) can determine the best economic driving speed and provide drivers' suggestions while maintaining the max throughput within a cycle time. The goal of this work is to demonstrate the advantages of reducing vehicles fuel consumption as well as CO2 emission by minimizing the unnecessary acceleration, brakes and stops. Simulation results vividly shows that CO2 emission can be reduced by 4 percent to 20 percent under different vehicle per hour (vph) cases following the proposed scheme.
{"title":"Decision-tree based green driving suggestion system for carbon emission reduction","authors":"Wei-Hsun Lee, Yan-Cheng Lai, Pei-Yin Chen","doi":"10.1109/ITST.2012.6425226","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425226","url":null,"abstract":"With the growing awareness on environmental protection, the reduction of fuel consumption and carbon dioxide (CO2) emission have been receiving considerable research interests. With the advances in vehicular ad-hoc network (VANET) technology, a green driving suggestion system is proposed to minimize the carbon emission by enhancing the intersection throughputs and providing drivers the best-economic driving suggestions. The idea of this work is to let the signal controllers (with built-in RSU) broadcast the signal countdown message and waiting queue information to the vehicles nearby the intersection, extending the range of drivers' visual contact to the signal. With these information, on-board unit (OBU) can determine the best economic driving speed and provide drivers' suggestions while maintaining the max throughput within a cycle time. The goal of this work is to demonstrate the advantages of reducing vehicles fuel consumption as well as CO2 emission by minimizing the unnecessary acceleration, brakes and stops. Simulation results vividly shows that CO2 emission can be reduced by 4 percent to 20 percent under different vehicle per hour (vph) cases following the proposed scheme.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130329904","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 : 2012-12-01DOI: 10.1109/ITST.2012.6425145
M. Hachisuka, C. Sugimoto, R. Kohno
DS-CDMA is one of schemes suitable for Inter-Vehicle Communication(IVC), but, when DS-CDMA is used, there is avoidable problem, Co-Channel Interference(CCI). OMF(Orthogonalizing Matched Filter) is considered suitable for ITS, because OMF can eliminate interference without knowing spread code of interference wave. However, also OMF has a problem. It is the number of taps in conventional OMF increases depending on spreading code length. So, in this study we propose Hierarchical OMF whichi is placed two OMFs hierarchically. Then, we show that proposal method has less taps than conventional OMF and interference rejection capability as well as conventional OMF.
{"title":"Interference canseller method using hierarchical OMF against concatenated sequence","authors":"M. Hachisuka, C. Sugimoto, R. Kohno","doi":"10.1109/ITST.2012.6425145","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425145","url":null,"abstract":"DS-CDMA is one of schemes suitable for Inter-Vehicle Communication(IVC), but, when DS-CDMA is used, there is avoidable problem, Co-Channel Interference(CCI). OMF(Orthogonalizing Matched Filter) is considered suitable for ITS, because OMF can eliminate interference without knowing spread code of interference wave. However, also OMF has a problem. It is the number of taps in conventional OMF increases depending on spreading code length. So, in this study we propose Hierarchical OMF whichi is placed two OMFs hierarchically. Then, we show that proposal method has less taps than conventional OMF and interference rejection capability as well as conventional OMF.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131193784","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 : 2012-12-01DOI: 10.1109/ITST.2012.6425184
Y. H. Ho
A major advantage of a wireless mesh network is its self-configuring functionality. When a mesh node fails, one can simply replace it with a new mesh node. Due to unpredictable changes of environment, the connectivity WMNs and the reliability of individual mesh node decreased rapidly. The connectivity disruptions are often to introducing delay or even worse dropping messages. Ideally, a failed mesh node should be repaired or replaced immediately to maintain the connectivity of WMN. However, this might be difficult to achieve due to the environment (e.g., bridges or tunnels) and limited resources. It is desirable to have a failure-resilient wireless mesh network that can temporarily withstand one or multiple failed mesh nodes until they can be taken care of. In this paper, we proposed a hybrid mesh network, called Resilient Mesh Network (RMN), that can effectively retain the coverage and capacity of the original network until the failed mesh nodes can be repaired or replaced.
{"title":"Enhancing robustness of wireless mesh networks using virtual routers","authors":"Y. H. Ho","doi":"10.1109/ITST.2012.6425184","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425184","url":null,"abstract":"A major advantage of a wireless mesh network is its self-configuring functionality. When a mesh node fails, one can simply replace it with a new mesh node. Due to unpredictable changes of environment, the connectivity WMNs and the reliability of individual mesh node decreased rapidly. The connectivity disruptions are often to introducing delay or even worse dropping messages. Ideally, a failed mesh node should be repaired or replaced immediately to maintain the connectivity of WMN. However, this might be difficult to achieve due to the environment (e.g., bridges or tunnels) and limited resources. It is desirable to have a failure-resilient wireless mesh network that can temporarily withstand one or multiple failed mesh nodes until they can be taken care of. In this paper, we proposed a hybrid mesh network, called Resilient Mesh Network (RMN), that can effectively retain the coverage and capacity of the original network until the failed mesh nodes can be repaired or replaced.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"85 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130779748","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 : 2012-12-01DOI: 10.1109/ITST.2012.6425247
Cheng-Yueh Liu, Cheng-An Lin, K. Chiang, S. Huang, Chin-Chia Chang, Jia-Ming Cai
INS/GPS integrated system has been one of the most popular methodologies in the research field of navigation technology. This paper aims at developing a real-time low-cost INS/GPS integrated navigator based on PC platform and reviewing many problems encountered in the development of real time system. A MEMS IMU is applied in the system to meet the requirements of low cost and small size. The proposed system utilizes Auto ZUPT/ZIHR as an accurate update source for EKF to improve the accuracy of navigation solutions during GPS signal blockages. In the end, various field tests which include a pure INS aided by ZUPT/ZIHR and NHC, a simple INS/GPS and an INS/GPS aided by ZUPT/ZIHR and NHC are conducted in downtown. The preliminary results illustrates the proposed system with frequent ZUPT/ZIHR provides a stable performance operating kinematically in free inertial mode without the aiding of GPS by 15 minutes with a low-cost IMU and the INS/GPS integrated solutions are improved by 50% when automatic ZUPT/ZIHR and NHC are applied in GPS denied areas.
{"title":"Performance evaluation of real-time MEMS INS/GPS integration with ZUPT/ZIHR/NHC for land navigation","authors":"Cheng-Yueh Liu, Cheng-An Lin, K. Chiang, S. Huang, Chin-Chia Chang, Jia-Ming Cai","doi":"10.1109/ITST.2012.6425247","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425247","url":null,"abstract":"INS/GPS integrated system has been one of the most popular methodologies in the research field of navigation technology. This paper aims at developing a real-time low-cost INS/GPS integrated navigator based on PC platform and reviewing many problems encountered in the development of real time system. A MEMS IMU is applied in the system to meet the requirements of low cost and small size. The proposed system utilizes Auto ZUPT/ZIHR as an accurate update source for EKF to improve the accuracy of navigation solutions during GPS signal blockages. In the end, various field tests which include a pure INS aided by ZUPT/ZIHR and NHC, a simple INS/GPS and an INS/GPS aided by ZUPT/ZIHR and NHC are conducted in downtown. The preliminary results illustrates the proposed system with frequent ZUPT/ZIHR provides a stable performance operating kinematically in free inertial mode without the aiding of GPS by 15 minutes with a low-cost IMU and the INS/GPS integrated solutions are improved by 50% when automatic ZUPT/ZIHR and NHC are applied in GPS denied areas.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128428668","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 : 2012-11-05DOI: 10.1109/ITST.2012.6425280
S. Hairoud, P. Combeau, Y. Pousset, Y. Cocheril, M. Berbineau
Modern subways operation relies on wireless systems based on IEEE802.11x modems deployed inside tunnels. Constraints on robustness and needs for high data rates led to the use of MIMO techniques. In order to evaluate performance of MIMO systems in dynamic configurations with moving trains, it is mandatory to develop adequate dynamic channel model. In this paper, the authors present a new WINNER based model for a subway tunnel at 5.8 GHz in a representative geometric configuration with two tracks and two crossing trains and a 4×4 MIMO system. The statistical behavior of the key parameters of the new WINNER scenario are derived from the complex impulse responses obtained with a 3D ray tracing simulator and given in this paper. Five clusters are considered. The total received power and the 4×4 MIMO channel capacity are compared with the ones derived from the 3D ray tracing simulator.
{"title":"WINNER model for subway tunnel at 5.8 GHz","authors":"S. Hairoud, P. Combeau, Y. Pousset, Y. Cocheril, M. Berbineau","doi":"10.1109/ITST.2012.6425280","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425280","url":null,"abstract":"Modern subways operation relies on wireless systems based on IEEE802.11x modems deployed inside tunnels. Constraints on robustness and needs for high data rates led to the use of MIMO techniques. In order to evaluate performance of MIMO systems in dynamic configurations with moving trains, it is mandatory to develop adequate dynamic channel model. In this paper, the authors present a new WINNER based model for a subway tunnel at 5.8 GHz in a representative geometric configuration with two tracks and two crossing trains and a 4×4 MIMO system. The statistical behavior of the key parameters of the new WINNER scenario are derived from the complex impulse responses obtained with a 3D ray tracing simulator and given in this paper. Five clusters are considered. The total received power and the 4×4 MIMO channel capacity are compared with the ones derived from the 3D ray tracing simulator.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128315507","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.2012.6425278
É. Masson, Y. Cocheril, M. Berbineau, J. Ghys, V. Hovinen, A. Roivainen
The demand for robust and high data rate wireless transmissions in tunnel leads to evaluate the impact of MIMO and diversity techniques over the channel performance in these types of environments. This paper presents a 4×4 MIMO channel sounding measurement campaign performed in the tunnels of the FGC (Ferrocarrils de la Generalitat de Catalunya) metro in Barcelona, at 5.8 GHz. Different configurations were tested with different antenna polarization and orientation in the tunnel. From these measurements, MIMO channel matrices are computed, in order to determine the correlation level of the channel and the MIMO channel capacity along the tunnel.
对隧道中鲁棒和高数据速率无线传输的需求导致评估MIMO和分集技术对这些类型环境中信道性能的影响。本文介绍了在巴塞罗那FGC (Ferrocarrils de la Generalitat de Catalunya)地铁隧道中进行的4×4 MIMO信道测深活动，频率为5.8 GHz。在隧道中测试了不同天线极化和取向的不同配置。从这些测量中，计算MIMO信道矩阵，以确定信道的相关水平和MIMO信道沿隧道的容量。
{"title":"MIMO channel characterization in subway tunnel for train-to-wayside applications","authors":"É. Masson, Y. Cocheril, M. Berbineau, J. Ghys, V. Hovinen, A. Roivainen","doi":"10.1109/ITST.2012.6425278","DOIUrl":"https://doi.org/10.1109/ITST.2012.6425278","url":null,"abstract":"The demand for robust and high data rate wireless transmissions in tunnel leads to evaluate the impact of MIMO and diversity techniques over the channel performance in these types of environments. This paper presents a 4×4 MIMO channel sounding measurement campaign performed in the tunnels of the FGC (Ferrocarrils de la Generalitat de Catalunya) metro in Barcelona, at 5.8 GHz. Different configurations were tested with different antenna polarization and orientation in the tunnel. From these measurements, MIMO channel matrices are computed, in order to determine the correlation level of the channel and the MIMO channel capacity along the tunnel.","PeriodicalId":143706,"journal":{"name":"2012 12th International Conference on ITS Telecommunications","volume":"150 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":"127518687","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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