scholarly journals UAV-Aided Data Delivery Scheme Based on Opportunistic Virtual Intersections for Smart Transportation Networks

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Wei Li ◽  
Xianxing Liu ◽  
Xiaoyong Ma ◽  
Xianwei Wang ◽  
Yi Zhou
Keyword(s):  
Vehicular Networks ◽  
Transportation Networks ◽  
High Mobility ◽  
Delivery Ratio ◽  
Data Delivery ◽  
Smart Transportation ◽  
Data Packets ◽  
Delivery Delay ◽  
Intermittent Connectivity ◽  
Delivery Probability

Smart transportation networks, featured by high mobility and intermittent connectivity, are facing critical challenges in data delivery especially when the network is sparse and with less or no support from any infrastructure, such as in disaster and military environments. Unmanned aerial vehicles (UAVs), due to their flexible mobility, can be envisioned to enhance the connectivity of ground vehicular networks. In this paper, incorporating UAVs into vehicular networks, a novel data delivery scheme, named UAV-assisted data delivery (UADD), is proposed for smart transportation networks. We introduce a novel concept called “opportunistic virtual intersections”, at which UAVs can communicate with ground vehicles, and assist to deliver data packets. Specifically, at an opportunistic virtual intersection, UAVs may act as a relay, which can relay data packets between two vehicles as an intermediate hop, or deliver data packets in a store-carry-and-forward manner. The data forwarding rules are devised based on expected delivery delay and delivery probability of data packets. The performance evaluation demonstrates that the proposed UAV-assisted data delivery scheme can achieve a significant improvement of data delivery performance in terms of delivery delay and delivery ratio.

scholarly journals A Fuzzy-Rule Based Data Delivery Scheme in VANETs with Intelligent Speed Prediction and Relay Selection

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Yi Zhou ◽  
Huanhuan Li ◽  
Chenhao Shi ◽  
Ning Lu ◽  
Nan Cheng
Keyword(s):  
Relay Selection ◽  
Vehicular Networks ◽  
High Mobility ◽  
Fuzzy Rule ◽  
Learning System ◽  
Delivery Ratio ◽  
Data Delivery ◽  
Vehicle Speed ◽  
Hop Count ◽  
Rule Based

Data delivery in vehicular networks (VANETs) is a challenging task due to the high mobility and constant topological changes. In common routing protocols, multihop V2V communications suffer from higher network delay and lower packet delivery ratio (PDR), and excessive dependence on GPS may pose threat on individual privacy. In this paper, we propose a novel data delivery scheme for vehicular networks in urban environments, which can improve the routing performance without relying on GPS. A fuzzy-rule-based wireless transmission approach is designed to optimize the relay selection considering multiple factors comprehensively, including vehicle speed, driving direction, hop count, and connection time. Wireless V2V transmission and wired transmissions among RSUs are both utilized, since wired transmissions can reduce the delay and improve the reliability. Each RSU is equipped with a machine learning system (MLS) to make the selected relay link more reliably without GPS through predicting vehicle speed at next moment. Experiments show the validity and rationality of the proposed method.

scholarly journals TEKNIK KOMUNIKASI DATA PADA AD HOC NETWORK COMMUNICATION

2014 ◽  
Vol 11 (2) ◽  
Author(s):  
Budi Rahmadya
Keyword(s):  
Mobile Networks ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Data Communication ◽  
High Mobility ◽  
Delay Tolerant Network ◽  
Network Communication ◽  
Destination Node ◽  
Delivery Ratio ◽  
Data Packets

Ad Hoc Network Communication is mobile networks communications and have a high mobility for each of its nodes. This type of network communications is a temporary networkwith utilizing a WiFi network or Bluethoot as a medium of communications. In the entirenetwork, node moves with a speed varying and unpredictable direction. Packets data delivery from the source node to destination node by using an ad hoc network requires its owntechniques. In this research discussed the existing data communication technique inVehicular Ad Hoc Network (VANETs) Communications with attention: Broadcasting Time, Routing Protocol, Message Dissemination, Delay Tolerant Network Dissemination and / DTN.These techniques can increase the delivery ratio / sending data packets to the destination as well as a smaller delay time. In order to maintain the integrity of the data packets received bythe destination node, the authors have proposed a method of duplicate messages in thisresearch.

Analysis of Effective Routing Protocols for Flying Ad-Hoc Networks

2020 ◽  
Vol 3 (2) ◽  
pp. 1-18 ◽  
Author(s):  
Sudesh Kumar ◽  
Abhishek Bansal ◽  
Ram Shringar Raw
Keyword(s):  
Routing Protocol ◽  
Ad Hoc Network ◽  
High Speed ◽  
Ad Hoc ◽  
Network Formation ◽  
High Mobility ◽  
Delivery Ratio ◽  
Data Packets ◽  
Hoc Networks ◽  
Networking Technology

Recently, the flying ad-hoc network (FANETs) is a popular networking technology used to create a wireless network through unmanned aerial vehicles (UAVs). In this network, the UAV nodes work as intermediate nodes that communicate with each other to transmit data packets over the network, in the absence of fixed an infrastructure. Due to high mobility degree of UAV nodes, network formation and deformation among the UAVs are very frequent. Therefore, effective routing is a more challenging issue in FANETs. This paper presents performance evaluations and comparisons of the popular topology-based routing protocol namely AODV and position-based routing protocol, namely LAR for high speed mobility as well as a verity of the density of UAV nodes in the FANETs environment through NS-2 simulator. The extensive simulation results have shown that LAR gives better performance than AODV significantly in terms of the packet delivery ratio, normalized routing overhead, end-to-end delay, and average throughput, which make it a more effective routing protocol for the highly dynamic nature of FANETs.

scholarly journals TEKNIK KOMUNIKASI DATA PADA AD HOC NETWORK COMMUNICATION

2014 ◽  
Vol 11 (2) ◽  
Author(s):  
Budi Rahmadya
Keyword(s):  
Mobile Networks ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Data Communication ◽  
High Mobility ◽  
Delay Tolerant Network ◽  
Network Communication ◽  
Destination Node ◽  
Delivery Ratio ◽  
Data Packets

Ad Hoc Network Communication is mobile networks communications and have a high mobility for each of its nodes. This type of network communications is a temporary networkwith utilizing a WiFi network or Bluethoot as a medium of communications. In the entirenetwork, node moves with a speed varying and unpredictable direction. Packets data delivery from the source node to destination node by using an ad hoc network requires its owntechniques. In this research discussed the existing data communication technique inVehicular Ad Hoc Network (VANETs) Communications with attention: Broadcasting Time, Routing Protocol, Message Dissemination, Delay Tolerant Network Dissemination and / DTN.These techniques can increase the delivery ratio / sending data packets to the destination as well as a smaller delay time. In order to maintain the integrity of the data packets received bythe destination node, the authors have proposed a method of duplicate messages in thisresearch.

scholarly journals Hybrid Position-Based and DTN Forwarding for Vehicular Sensor Networks

2012 ◽  
Vol 8 (4) ◽  
pp. 186146 ◽  
Author(s):  
Fan Li ◽  
Lei Zhao ◽  
Xiumei Fan ◽  
Yu Wang
Keyword(s):  
Sensor Networks ◽  
Routing Protocols ◽  
Large Scale ◽  
Vehicular Networks ◽  
Ad Hoc ◽  
Delivery Ratio ◽  
Data Delivery ◽  
Ad Hoc Routing ◽  
Efficient Data ◽  
Set Up

Efficient data delivery in vehicular sensor networks is still a challenging research issue. Position-based routing protocols have been proven to be more suitable for dynamic vehicular networks or large-scale mobile sensor networks than traditional ad hoc routing protocols. However, position-based routing assumes that intermediate nodes can always be found to set up an end-to-end connection between the source and the destination; otherwise, it suffers from network partitions which are very common in vehicular networks and leads to poor performances. This paper addresses data delivery challenge in the possible intermittently connected vehicular sensor networks by combining position-based forwarding strategy with store-carry-forward routing scheme from delay tolerant networks. The proposed routing method makes use of vehicle driving direction to determine whether holding or forwarding the packet. Experimental results show that the proposed mechanism outperforms existing position-based solutions in terms of packet delivery ratio.

scholarly journals “An Approach for Intersection Prevention in Transmission Channel Using Correlation Matrix and Tree Construction Model in V2x Framework”

2021 ◽  
Author(s):  
GraceShalini T ◽  
Jenicka S
Keyword(s):  
Correlation Matrix ◽  
Vehicular Ad Hoc Networks ◽  
High Mobility ◽  
Delivery Ratio ◽  
Transmission Channel ◽  
Efficient Manner ◽  
Data Packets ◽  
Redundant Data ◽  
Packet Collision ◽  
Tree Construction

Abstract Typically, the delivery of information in vehicular ad hoc networks (VANETs) is regarded as a demanding one because of high mobility and invariable topological difference. One major concern in VANET framework is the occurrence of simulated intersection at which the packet reception probability become complicated for predicting and the model turn out to be complex highly. So as to overcome this dispute, a new framework is introduced which in turn prevents the intersection among the transmission path. Initially, the system model is initialized and the availability of channel is estimated. Based on the strength and size of data to be transmitted, the availability of channel is computed. After that, the best forwarding zone computation is made for minimizing the redundant data packets flow. To check the priority of packet and occurrence of packet collision, tree construction based data strength transmission is employed. at last, the prevention of intersection or collision between the transmission channel is checked by means of correlation matrix based intersection prevention approach by monitoring the neighbor node. Then, the data packets were forwarded in an efficient manner without any intersection between the frames. The performance analysis is estimated in terms of network lifetime, packet delivery ratio, packet collision; inter node collision, throughput, and end-to-end delay.

scholarly journals A Data Forwarding Approach for Fire-Rescue Scenario with Multi-Type Mobile Nodes

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Linfeng Liu ◽  
Ping Zhou ◽  
Jiagao Wu ◽  
Ran Wang ◽  
Xiaojun Fan ◽  
...  
Keyword(s):  
Sensor Nodes ◽  
Delivery Ratio ◽  
Small Range ◽  
Mobile Nodes ◽  
Data Forwarding ◽  
Control Center ◽  
Structure Damage ◽  
Data Packets ◽  
Delivery Delay ◽  
Environmental Events

The opportunistic mobile sensor network has been extensively applied in various public safety applications such as the fire rescue and earthquake rescue, since it can provide a surveillance range with an inexpensive cost and avoid the dangers of humans staying in risk zones. However, due to some environmental events such as building structure damage, airflow push, and fire explosions, the sensor nodes sprinkled into the fire-rescue scenario may be kept moving. Thus, the contacts between nodes become momentary, and the data packets cannot be forwarded along stable communication paths. To this end, the opportunistic forwarding manner is adopted in the fire-rescue scenario to enable the data packets to be transferred to the rescue control center (RCC) through some discrete hops. The contributions of this paper are threefold. First, the nodes in the fire-rescue scenario are carefully investigated and classified into four types: small-range mobile nodes (SRNs), large-range mobile nodes (LRNs), firefighter nodes (FNs), and robot nodes (RNs). Second, we formulate the data forwarding problem, and the optimal proportions of SRNs, LRNs, and FNs in data holders are mathematically analyzed to obtain the maximum delivery ratio. Third, a data forwarding approach for fire-rescue scenario (DFAFR) is proposed. In DFAFR, the optimal proportions of SRNs, LRNs, and FNs in data holders are maintained as far as possible through selecting different types of data holder candidates, and then the new data holders are determined from these data holder candidates and the adjacent RNs on basis of their expected delivery delay. Finally, the performance of DFAFR is analyzed through simulations of the fire-rescue scenario, and the results indicate that DFAFR can enhance the delivery ratio and shorten the delivery delay while the forwarding overhead is restricted.

Infrastructure Assisted Data Dissemination for Vehicular Sensor Networks in Metropolitan Areas

2012 ◽  
pp. 264-287
Author(s):  
Aysegül Tüysüz Erman ◽  
Ramon S. Schwartz ◽  
Arta Dilo ◽  
Hans Scholten ◽  
Paul Havinga
Keyword(s):  
Sensor Networks ◽  
Data Dissemination ◽  
Dynamic Networks ◽  
Sensor Data ◽  
Delivery Ratio ◽  
Data Delivery ◽  
Communication Infrastructure ◽  
The Road ◽  
V2v Communication ◽  
Intermittent Connectivity

Vehicular Sensor Networks (VSNs) are an emerging area of research that combines technologies developed in the domains of Intelligent Transport Systems (ITS) and Wireless Sensor Networks. Data dissemination is an important aspect of these networks. It enables vehicles to share relevant sensor data about accidents, traffic load, or pollution. Several protocols are proposed for Vehicle to Vehicle (V2V) communication, but they are prone to intermittent connectivity. In this chapter, the authors propose a roadside infrastructure to ensure stable connectivity by adding vehicle to infrastructure to the V2V communication. They introduce a data dissemination protocol, Hexagonal Cell-Based Data Dissemination, adapting it for VSNs within a metropolitan area. The virtual architecture of the proposed data dissemination protocol exploits the typical radial configuration of main roads in a city, and uses them as the basis for the communication infrastructure where data and queries are stored. The design of the communication infrastructure in accordance with the road infrastructure distributes the network data in locations that are close or easily reachable by most of the vehicles. The protocol performs a geographical routing and is suitable for highly dynamic networks, supporting a high number of mobile sources and destinations of data. It ensures reliable data delivery and fast response. The authors evaluate the performance of the proposed protocol in terms of data delivery ratio and data delivery delay. The simulation results show that HexDD significantly improves the data packet delivery ratio in VANETs.

scholarly journals Effective Traffic Management System for Vehicular Network

2019 ◽  
Vol 9 (1) ◽  
pp. 453-457
Keyword(s):  
Routing Protocols ◽  
Traffic Congestion ◽  
Traffic Management ◽  
Vehicular Ad Hoc Networks ◽  
Intelligent Transportation System ◽  
High Mobility ◽  
Delivery Ratio ◽  
Data Delivery ◽  
Traffic Light ◽  
Priority Assignment

Vehicular ad hoc networks are becoming the promising research topic in Intelligent transportation system. VANET enable the collaboration amongst multiple vehicle communication which supports by their arrangement and infrastructure for consistent data delivery services. Due to high mobility of vehicles, the data cannot be delivered between vehicles with change in their topologies and its becoming an emerging high area in the field of research. However, the ideal characteristics of vanet routing protocols make proper connectivity for reliable and effective data delivery in traffic scenarios. This article starts with traffic congestion and dissemination of the information to nearby vehicles for making smart city into a very smarter one. As a result of miscommunication between the vehicles , severe accidents happened scores of times especially in the traffic prevailing areas. In order to mitigate terrible accidents, We then focus on (traffic light aware routing protocol) TLRC with (Soft Reservation Multiple Access with Priority Assignment) SRMA/PA routing protocols at intersections and traffic light signals under traffic congestion. In Sum, this article enriches the performance of data delivery ratio and end to end delay in exchanging data between Vanet equipped vehicles.

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