{"title":"A novel beaconing approach based on sender-centric movement predictions for collision avoidance in VANETS","authors":"Robert Lasowski, Florian Gschwandtner","doi":"10.1145/2030698.2030713","DOIUrl":"https://doi.org/10.1145/2030698.2030713","url":null,"abstract":"The detection of potential collisions between vehicles is one of the main functionalities of Vehicular Ad-Hoc Networks (VANETs). Vehicles periodically exchange beacon messages by using wireless communication. From the obtained information the receiver calculates the collision probability by predicting the potential movement of every neighbor. Due to the highly dynamic movement of vehicles the accuracy of a prediction is mainly related to the detailed knowledge about the sender. However, as wireless communication suffers from interference due to a saturated communication channel, the context information within a beacon has to be limited. To accomplish this issue while achieving highly accurate predictions, we propose a scalable sender-centric prediction approach based on the available sender's context information.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125025555","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}
{"title":"Context-aware collection, decision, and distribution (C2D2) engine for multi-dimensional adaptation in vehicular networks","authors":"J. Camp, O. Altintas, Rama Vuyyuru, D. Rajan","doi":"10.1145/2030698.2030715","DOIUrl":"https://doi.org/10.1145/2030698.2030715","url":null,"abstract":"Wireless vehicular networks have highly complex and dynamic channel state leading to a challenging environment to maintain connectivity and/or achieve high levels of throughput while also satisfying latency requirements of diverse vehicular applications. Adaptation over a large parameter space such as multiple frequency bands, novel modulation and coding schemes, and routing protocols is important in achieving good performance in this challenging setting. Vehicles now include a plethora of sensors which can be used to establish a clearer notion of the environmental context. However, while it is well understood that wireless performance greatly depends on this contextual information, protocols that leverage this information to improve wireless performance have yet to be fully developed. In this work, we will lay a foundation for developing context-aware intelligence to interface with existing adaptation protocols at multiple layers of the network stack. The core of this system consists of a context-aware collection, decision, and distribution (C2D2) engine. We give a brief overview of the architecture, design, and operation of the C2D2 engine.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126805850","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}
Tristan Gaugel, Felix Schmidt-Eisenlohr, Jens Mittag, H. Hartenstein
{"title":"A change in perspective: information-centric modeling of inter-vehicle communication","authors":"Tristan Gaugel, Felix Schmidt-Eisenlohr, Jens Mittag, H. Hartenstein","doi":"10.1145/2030698.2030708","DOIUrl":"https://doi.org/10.1145/2030698.2030708","url":null,"abstract":"Inter-vehicle communication with the objective to increase safety and efficiency of our transportation network has been studied extensively in the last few years. However, we are still struggling in answering the fundamental question of to which extent can inter-vehicle communication improve our wide-area transportation network that consists of more than several cities?. In this position paper we discuss from a methodological point of view and by analyzing recent trends how the VANET community could move forward with respect to evaluation methodologies. Based on our observations, we argue that the vehicular networking community might need to extend its perspective -- from bits and packets towards information-centric models -- when assessing efficiency gains in large scale scenarios, thereby providing a multi-scale approach as it is done in various disciplines. We further believe that the community should join forces to convert existing results as well as current and upcoming measurements to provide information-centric models of inter-vehicular communication. We finally propose a modeling approach that could serve as a foundation for future joint efforts and which might take us one step closer to the answer of the fundamental question stated above.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115902769","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}
{"title":"Analytic design of active vehicular safety systems in sparse traffic","authors":"M. Nekoui, H. Pishro-Nik","doi":"10.1145/2030698.2030716","DOIUrl":"https://doi.org/10.1145/2030698.2030716","url":null,"abstract":"We propose a design methodology to determine the optimal transmission parameters for delay-critical safety applications in vehicular ad hoc networks. We develop a model to characterize the delay requirements needed to prevent rear-end collisions. By adopting a stochastic geometry framework to simultaneously address multi-user interference, path loss, and fading, we then analytically derive the transmission rate, range, and channel access probability of the nodes that satisfy the delay requirement at a target success probability.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127587487","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}
{"title":"Charging scheduling with minimal waiting in a network of electric vehicles and charging stations","authors":"Hua Qin, Wensheng Zhang","doi":"10.1145/2030698.2030706","DOIUrl":"https://doi.org/10.1145/2030698.2030706","url":null,"abstract":"Environment preservation has become a prominent issue around the world. As traditional internal combustion engine (ICE) vehicles have been major contributors of air pollution, electric vehicles (EVs) are gaining popularity. However, due to the limited electricity supply of battery pack, EVs need to be charged frequently and each charge takes long time. This may degrade travel efficiency and driver comfort. To address this issue, this paper aims to minimize charging waiting time through intelligently scheduling charging activities spatially and temporally. A theoretical study has been conducted to formulate the waiting time minimized charging scheduling problem and derive a performance upper bound (i.e., the theoretical lower bound of charging waiting time). Based on the insights discovered from the theoretical analysis, a practical distributed scheme has been proposed. Extensive simulation results verify that the proposed design can achieve a waiting time near the theoretical lower bound.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134028106","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}
{"title":"Realizing an effective and flexible Car2X evaluation strategy through modular and multi-scaled traffic simulation","authors":"M. Baur, M. Fullerton, F. Busch","doi":"10.1145/1860058.1860072","DOIUrl":"https://doi.org/10.1145/1860058.1860072","url":null,"abstract":"We propose a new simulation framework that can translate a single vehicular inter-networking use case to different simulation tools with multiple traffic networks and/or data sets. This allows tools to be compared and combined as appropriate for the given use case to improve both the scalability, usability and validity in the study at hand.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127453865","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}
{"title":"CORNER: a step towards realistic simulations for VANET","authors":"E. Giordano, Raphaël Frank, G. Pau, M. Gerla","doi":"10.1145/1860058.1860065","DOIUrl":"https://doi.org/10.1145/1860058.1860065","url":null,"abstract":"Advances in portable technologies and emergence of new applications stimulate interest in urban vehicular communications for commercial, military, and homeland defense applications. Simulation is an essential tool to study the behavior and evaluate the performance of protocols and applications in large-scale urban vehicular networks.\u0000 In this paper we propose CORNER a low computational cost yet accurate urban propagation model for mobile networks. CORNER estimates the presence of buildings and obstacles along the signal path using information extrapolated from urban digital maps. A reverse geocoding algorithm is used to classify the propagation situation of any two nodes that need to communicate starting from their geographical coordinates. Sender and Receiver are classified as in Line of Sight if there are no obstacles in between, and as NON in Line of Sight when there are obstacles (i.e. buildings) between them. CORNER has been validated through extensive on-the-road experiments, the results show high accuracy in predicting the network connectivity. In addition, on-the-road experiments suggest the need to refine the fading model to differentiate between Line of Sight, and NON Line of Sight situations. Finally, we show the impact of CORNER on simulation results for widely used applications.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132182177","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}
{"title":"Dynamic highway congestion detection and prediction based on shock waves","authors":"Dijiang Huang, Swaroop Shere, Soyoung Ahn","doi":"10.1145/1860058.1860061","DOIUrl":"https://doi.org/10.1145/1860058.1860061","url":null,"abstract":"Existing highway traffic monitoring system requires to deploy a large number of sensors and video cameras to detect traffic congestions, which is costly and prone to errors and failures [1]. In this paper, we present a distributed traffic detection and prediction solution by using shock wave traffic model. We develop a Hello protocol to maintain the vehicle sequence on the same lane. Based on the measurements of velocity and distance between immediate leading and following vehicles, a vehicle can detect and compute shock wave velocity incurred by vehicle merges or obstacles on the highway. When velocity changes occur continuously, congestions will be formed, which can be detected and predicted by the vehicles through a shock wave detection procedure. Our solution is effective since we only require vehicles to communicate with its neighboring vehicles within its wireless communication range.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121958396","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}
T. Kim, Ahren Studer, Rituik Dubey, Xin Zhang, A. Perrig, F. Bai, B. Bellur, A. Iyer
{"title":"VANET alert endorsement using multi-source filters","authors":"T. Kim, Ahren Studer, Rituik Dubey, Xin Zhang, A. Perrig, F. Bai, B. Bellur, A. Iyer","doi":"10.1145/1860058.1860067","DOIUrl":"https://doi.org/10.1145/1860058.1860067","url":null,"abstract":"We propose a security model for Vehicular Ad-hoc Networks (VANETs) to distinguish spurious messages from legitimate messages. In this paper, we explore the information available in a VANET environment to enable vehicles to filter out malicious messages which are transmitted by a minority of misbehaving vehicles. More specifically, we introduce a message filtering model that leverages multiple complementary sources of information to construct a multi-source detection model such that drivers are only alerted after some fraction of sources agree. Our filtering model is based on two main components: a threshold curve and a Certainty of Event (CoE) curve. A threshold curve implies the importance of an event to a driver according to the relative position, and a CoE curve represents the confidence level of the received messages. An alert is triggered when the event certainty surpasses a threshold. We analyze our model and provide some initial simulation results to demonstrate the benefits.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122565271","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}
{"title":"Communication requirements for crash avoidance","authors":"J. Haas, Yih-Chun Hu","doi":"10.1145/1860058.1860060","DOIUrl":"https://doi.org/10.1145/1860058.1860060","url":null,"abstract":"Safety applications are a driving force behind VANET deployment. Automobile manufacturers, government organizations, and consortia of the two have been investigating using VANETs for safety applications. Though VANETs are in large part designed for safety applications, researchers do not yet know the communication requirements of VANET safety messages. As a result, protocol designers have relied on generic network success metrics, such as packet delivery ratio, to evaluate their protocols. However, a more useful metric is the ability of currently proposed VANET schemes (e.g., for authentication, power control, etc.) to allow vehicles to receive safety messages and warn their drivers sufficiently in advance of an accident so that the driver can avoid the accident. Besides the basic safety message service, researchers have proposed other VANET mechanisms and services including mix zones [2, 5] and silent periods [18, 8, 17] to enhance vehicle privacy, intelligent transportation systems [24], and commercial applications [12]. However, these applications face a similar question: will a VANET be able to support these services and still achieve the safety goals for which the VANET was designed?\u0000 Previous attempts at answering the above questions have been made using small test beds without any collisions and using vehicle kinematics and message reception probabilities. However, each of these approaches lack the realism (i.e., actual crashes) and scale that VANETs will have. In this paper, we present our results from simulating two vehicular safety applications. We simulated crash scenarios and determined the probability that vehicles could avoid the crashes. Additionally, we measured the communication requirements needed for those probabilities.","PeriodicalId":416154,"journal":{"name":"International Workshop on VehiculAr Inter-NETworking","volume":"630 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131621108","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}