The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper comes up with a SDN based On-Demand Routing Protocol, SVAO, which separates data forwarding layer and network control layer, as in SDN, to enhance the data transmission efficiency within VANETs. The Roadside Service Unit plays the role of Local Controller and is in charge of selecting vehicles to forward packet within a road segment. All the vehicles state in the road. Correspondingly,...
It does not seem easy to generate reliable routes in Vehicular Ad-hoc Networks (VANETs) because of frequent link failures caused by vehicle's mobility. In this regard, we analyze the characteristics of topology-based routing protocols in order to assess the feasibility of each protocol for vehicular environments. We plan to design an efficient routing protocol for VANETs in order to generate reliable...
Vehicular Ad hoc Networks (VANET) is an part of future Intelligent Transportation System (ITS) that enables vehicles and roadside units to communicate with each other. Different driving environments, i.e., downtown, residential, and suburban, have different roads topology and characteristics. Downtown environment is mostly characterized with cluttered dense obstacles, residential is characterized...
Geographic routing protocols have been developed for efficient V2V and V2I communications in vehicular ad hoc networks (VANETs). Existing approaches tackle challenges in urban environments such as dynamic vehicular network topology. However, in more realistic urban environments, vehicular networks are highly dynamic due to the complicated road topology and vehicular mobility, as well as shadowing...
In this paper we propose a highly detailed map for the field of autonomous driving. We introduce the notion of lanelets to represent the drivable environment under both geometrical and topological aspects. Lanelets are atomic, interconnected drivable road segments which may carry additional data to describe the static environment. We describe the map specification, an example creation process as well...
VANET plays an important role in dissemination of traffic and emergency information among vehicles moving on roads. This information is used by various vehicular applications like safety applications, route guiding applications etc. However, because of high mobility of vehicular nodes, maintenance of routing tables generates high network traffic. In this paper we have proposed an optimization of Zone...
Multi-hop message forwarding based on geographic coordinates is a fundamental building block for vehicular communication. However, the unstable links and wide range of node densities make it challenging to design an algorithm suitable for vehicular use. We introduce DAZL, a new forwarding protocol that combines three concepts in a novel way. First, multiple nodes cooperate in packet forwarding. Compared...
This paper belongs to the field of communication and computer networks. Networks of low earth orbiting satellites are able to provide wireless connectivity to any part of the world while ensuring timely and better performance lower bit error rate. This type of technology has been growing interest towards the development of small satellites. Especially, when we talk about the execution of the service...
The field of Wireless Sensor Networks (WSN) is undergoing a major revolution, opening the prospect of significant impact in many application areas (safety, health, environment, food safety, manufacturing, telecommunications. Routing isfundamental such a network because there is no infrastructure that manages the information exchanged between network nodes. Two major classes of routing algorithms are...
Vehicles equipped with communication capability, allows for inter-vehicle communication. Vehicular ad hoc network(VANET) is a subclass of MANET having no fixed infrastructure and rely on nodes to provide network functionality. Vehicular ad hoc network is dominated by its unique characteristics of rapid but predictable topology changes with frequent fragmentation and small effective network diameter...
It is possible to provide applications for life-saving and traffic control on VANET in which characteristic of high mobility and extreme topology changes is shown. And greedy-forwarding strategy that is one of the position-based routing schemes cause inefficient path forwarding and frequent transmission failure. Thus, we propose efficient routing scheme using circular node to provide service registration...
In this paper, we introduce a new geographic routing scheme for urban vehicular environments called ??Dynamic Road Connectivity-based Routing?? (D-RCBR). The proposed approach exploits distributed information about road connectivity and vehicles distribution to optimize routing decisions. To ensure the packet delivery, D-RCBR defines a new concept of Road Connectivity that provides local topology...
Geographical source routing is a promising routing technique for VANETs, due to its adaptability for network dynamics and ability to handle topology holes. In traditional geographical source routing algorithms a best-known neighbor, typically the neighbor closest to the next junction in a greedy fashion, is designated as the next hop. This approach may cause two drawbacks: (1) the designated neighbor...
Wireless mesh network (WMN) has become a popular access network architecture. But because of its multi-hop nature, co-channel interference and contention, the attainable capacity of a wireless node in a WMN is significantly less than the radio capacity. We propose a overlay architecture for a WMN, where a wireless-ring (WRing) is deployed over the regular mesh for carrying wireless mesh traffic only...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.