Filters








16,762 Hits in 7.7 sec

Enabling Routes of Road Network Constrained Movements as Mobile Service Context

Agnė Brilingaitė, Christian S. Jensen
2007 Geoinformatica  
Mobile users frequently follow the same route to a destination as they did during previous trips to the destination, and the route and destination constitute important aspects of the context for a range  ...  Experiences from using the component on logs of GPS positions acquired from vehicles traveling within a real road network are reported.  ...  We would also like to thank the company Euman A/S for sharing their insights into road data management with us, and for constructive comments.  ... 
doi:10.1007/s10707-006-0010-z fatcat:qohzky4ourdbxndsqahkltycye

Mobility Models for Vehicular Ad-hoc Network Simulation

Vaishali D. Khairnar, Dr. S.N. Pradhan
2010 International Journal of Computer Applications  
One of the emerging applications that belong to ambient systems is to transparently and directly interconnect vehicles on roads, making an ad hoc network that enables a variety of applications through  ...  The network as well as the embedded computers and sensors in the vehicle will be invisible to the driver, who will get the required services during his journey.  ...  The larger variance in MOVE data points is possibly due to unstable network connectivity imposed by constrained node movements by roads and traffic control mechanisms [14,15,16].  ... 
doi:10.5120/1573-2103 fatcat:3hmpnhh7zrb5pijdixuzjb4zbm

Mobility models for Vehicular Ad-hoc Network simulation

Vaishali D. Khairnar, S. N. Pradhan
2011 2011 IEEE Symposium on Computers & Informatics  
One of the emerging applications that belong to ambient systems is to transparently and directly interconnect vehicles on roads, making an ad-hoc network that enables a variety of applications through  ...  The network as well as the embedded computers and sensors in the vehicle will be invisible to the driver, who will get the required services during his journey.  ...  The larger variance in MOVE data points is possibly due to unstable network connectivity imposed by constrained node movements by roads and traffic control mechanisms [14,15,16].  ... 
doi:10.1109/isci.2011.5958959 fatcat:ndojbmqx4jc6hlkc6g72f5kdbm

Information Dissemination in Mobile Ad-Hoc Geosensor Networks [chapter]

Silvia Nittel, Matt Duckham, Lars Kulik
2004 Lecture Notes in Computer Science  
This paper addresses the issue of how to disseminate relevant information to mobile agents within a geosensor network.  ...  Conventional mobile and location-aware systems are founded on a centralized model of information systems, typified by the client-server model used for most location-based services.  ...  Mobility parameters such as speed of movement, patterns of movement (e.g., goal-directed movement or random walks), and constraints to movement (e.g., by the environment or agent congestion) are available  ... 
doi:10.1007/978-3-540-30231-5_14 fatcat:cxq77qibxbesdetpgeflqshyy4

Geo-Enabled, Mobile Services—A Tale of Routes, Detours, and Dead Ends [chapter]

Christian S. Jensen
2006 Lecture Notes in Computer Science  
We are witnessing the emergence of a global infrastructure that enables the widespread deployment of geo-enabled, mobile services in practice.  ...  At the same time, the research community has also paid increasing attention to data management aspects of mobile services.  ...  Second, routes are significant as context for a range of services.  ... 
doi:10.1007/11733836_3 fatcat:v7wposhaffdahb6owxrnmyh6ym

Survey of Context-Aware Video Transmission over Vehicular Ad-Hoc Networks (VANETs)

Reem Shaibani, Ammar Zahary
2019 EAI Endorsed Transactions on Mobile Communications and Applications  
Vehicular ad-hoc networks (VANETs) are defined as a group of wireless mobile nodes that characterized by their high mobility.  ...  Context-aware vehicular ad-hoc network is a novel field that introduces developed solutions for the previous challenges in VANETs and guarantees the stability of its topology through different high mobility  ...  Also they are constrained by the requirement to obey road signs and traffic light and to respond to other moving vehicles leading to predictability in term of their mobility.  ... 
doi:10.4108/eai.13-7-2018.156089 fatcat:k6r5q4juljbwfgljhgaw6ul7jq

Communication protocols for vehicular ad hoc networks

Arnaud Casteigts, Amiya Nayak, Ivan Stojmenovic
2011 Wireless Communications and Mobile Computing  
A particular emphasis is on recent protocols that realistically consider the inherently complex nature of vehicular mobility, such as intermittent connectivity, speed variability, and the impact of intersections  ...  networks, which are (i) the potential for a large set of innovative applications, (ii) a review of the main modeling approaches used for both roads and traffic, and finally two important communication  ...  Vehicular networks are a very specific kind of mobile networks, where the motion of nodes is constrained by the underlying road.  ... 
doi:10.1002/wcm.879 fatcat:xi2fjj5hj5ez7nbhfnict7wbiu

CARAVAN: A Context-AwaRe Architecture for VANET [chapter]

Sawomir Kukliski, Grzegorz Wolny
2011 Mobile Ad-Hoc Networks: Applications  
Contexts are related to service/application requirements, communication ability, mobility vectors and the mutual space-time relations of cars/nodes.  ...  Of course, the above mentioned VANET problem with highly unreliable communication will limit the service portfolio in the same way as it is observed in other networks.  ...  The mobility context of the node itself and of the neighborhood can be used to make some movement prediction.  ... 
doi:10.5772/13128 fatcat:rcpuoak5qvhrjcrqeoscpuethe

An integrated mobility and traffic model for vehicular wireless networks

David R. Choffnes, Fabián E. Bustamante
2005 Proceedings of the 2nd ACM international workshop on Vehicular ad hoc networks - VANET '05  
through the network affects node mobility.  ...  We show that when nodes move according to our street mobility model, STRAW, network performance is significantly different from that of the commonly used random waypoint model.  ...  In the context of vehicular networks, a small number of researchers have accounted for street-constrained motion using real road plans.  ... 
doi:10.1145/1080754.1080765 dblp:conf/mobicom/ChoffnesB05 fatcat:vfnbeaid3jg6zepu3qtknmao2a

Moving Objects in Databases and GIS: State-of-the-Art and Open Problems [chapter]

Markus Schneider
2009 Lecture Notes in Geoinformation and Cartography  
This technology enables the user to model, store, retrieve, and query the movements of spatial objects over time, called moving objects, and to ask queries about such movements in a database context.  ...  For example, assume a car driving on a road network has taken a particular route so far.  ... 
doi:10.1007/978-3-540-88244-2_12 fatcat:zjhrrsfxejehzd5fvmb6liosqa

VANET: Routing Protocols, Security Issues and Simulation Tools

Mushtak Y Gadkari
2012 IOSR Journal of Computer Engineering  
One of the main challenges in Vehicular ad hoc network is of searching and maintaining an effective route for transporting data information.  ...  Several unexpected disastrous situations are encountered on road networks daily, many of which may lead to congestion and safety hazards.  ...  Car movements are constrained by these lanes. Vehicles will move with a random speed, within an user-defined range of values.  ... 
doi:10.9790/0661-0332838 fatcat:64lhfy5qtnef7ffspb36tbtwxy

A Review on Path Selection and Navigation Approaches Towards an Assisted Mobility of Visually Impaired People

2020 KSII Transactions on Internet and Information Systems  
In this paper, we analyze the existing works and identify the challenges of path selection, context awareness, obstacle detection/identification and integration of visual and nonvisual information associated  ...  with real-time assisted mobility.  ...  Road Networks Route skyline queries [18] Models the road network as a multi-attribute graph Graph Embedding Approach Shortest path Road Networks Table 2 . 2 This table summarizes various  ... 
doi:10.3837/tiis.2020.08.007 fatcat:k3r6ceqxcbg7xkllthpox3ix3a

Data communication in VANETs: Protocols, applications and challenges

Felipe Cunha, Leandro Villas, Azzedine Boukerche, Guilherme Maia, Aline Viana, Raquel A. F. Mini, Antonio A. F. Loureiro
2016 Ad hoc networks  
Although, considered as a special case of a Mobile Ad Hoc Network, the high but constrained mobility of vehicles bring new challenges to data communication and application design in VANETs.  ...  In particular, we discuss the protocol stack of this type of network, and provide a qualitative comparison between most common protocols in the literature.  ...  The performance of routing protocols depends on different factors such as vehicular mobility model, data traffic, and road layouts.  ... 
doi:10.1016/j.adhoc.2016.02.017 fatcat:ghtuu4nqbbay3pq4vpy33ws4aa

A Study on Mobile Telecom Network Traffic Using Mobility Pattern

K. Ramya, Ms. R.Asmetha Jeyarani
2014 IOSR Journal of Computer Engineering  
In the present the Gradient Adaptive protocol is to efficiently maintain a sequence at a particular geographic location in a light network of highly mobile nodes without using infrastructure networks.  ...  A Single feature of this protocol is that it records the routing information while moving away from the origin and exploits the recorded moving devices to time accurately the return path.  ...  The field measurements from the GSM and UMTS networks are analysed in a road traffic information context.  ... 
doi:10.9790/0661-16338891 fatcat:cgdbw434p5g7pp7brubj3iw2n4

Modeling and Predicting Future Trajectories of Moving Objects in a Constrained Network

Jidong Chen, Xiaofeng Meng, Yanyan Guo, S. Grumbach, Hui Sun
2006 7th International Conference on Mobile Data Management (MDM'06)  
Advances in wireless sensor networks and positioning technologies enable traffic management (e.g. routing traffic) that uses real-time data monitored by GPS-enabled cars.  ...  In this paper, we model the road network and moving objects in a graph of cellular automata (GCA), which makes full use of the constraints of the network and the stochastic behavior of the traffic.  ...  Conclusion Managing moving objects in a constrained network is a challenging task as well as of great practical importance in mobile location-aware applications.  ... 
doi:10.1109/mdm.2006.107 dblp:conf/mdm/ChenMGGS06 fatcat:ir5hnfx62fcgjlccsurs7agrre
« Previous Showing results 1 — 15 out of 16,762 results