scholarly journals Source Coding Options to Improve HEVC Video Streaming in Vehicular Networks

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3107 ◽  
Author(s):  
Pedro Abenza ◽  
Manuel Malumbres ◽  
Pablo Piñol ◽  
Otoniel López-Granado
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Video Quality ◽  
Node Mobility ◽  
Network Simulator ◽  
Video Delivery ◽  
Simulation Framework ◽  
Mobility Patterns ◽  
Hoc Networks

Video delivery in Vehicular Ad-hoc NETworks has a great number of applications. However, multimedia streaming over this kind of networks is a very challenging issue because (a) it is one of the most resource-demanding applications; (b) it requires high bandwidth communication channels; (c) it shows moderate to high node mobility patterns and (d) it is common to find high communication interference levels that derive in moderate to high loss rates. In this work, we present a simulation framework based on OMNeT++ network simulator, Veins framework, and the SUMO mobility traffic simulator that aims to study, evaluate, and also design new techniques to improve video delivery over Vehicular Ad-hoc NETworks. Using the proposed simulation framework we will study different coding options, available at the HEVC video encoder, that will help to improve the perceived video quality in this kind of networks. The experimental results show that packet losses significantly reduce video quality when low interference levels are found in an urban scenario. By using different INTRA refresh options combined with appropriate tile coding, we will improve the resilience of HEVC video delivery services in VANET urban scenarios.

scholarly journals Mobility Prediction issues and Challenges in Vehicular Ad-Hoc Networks

2020 ◽  
pp. 992-999
Author(s):  
Kishor N Tayade ◽  
M U Kharat ◽  
S V Gumaste
Keyword(s):  
Ad Hoc Networks ◽  
Road Safety ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Mobility Prediction ◽  
Node Mobility ◽  
Topology Changes ◽  
Stable Path ◽  
Hoc Networks ◽  
Prediction Techniques

Vehicular Ad Hoc Networks (VANETs) are gaining much attention from both industry and academia communities as an emerging technology. VANET is composed of self-regulating nodes where the vibrant node mobility changes the network topology frequently. The important aim of VANET is to upgrade road safety conditions to minimize extent of road mishaps. The nodes are very mobile in vehicular ad hoc network so routing becomes complex job. As the VANET nodes move very fast the topology changes accordingly. So node mobility prediction in VANET is a very important issue. Further, prediction of mobility helps to estimate the stable path between the nodes which leads to better routing. Estimating secure paths among the routing of nodes perform in a better way, thereby reducing the overhead and minimizing interruptions in connections. This paper explores VANET's basic architecture and discusses a number of current mobility prediction techniques, and concludes with performance analysis of existing routing protocols and proposed mobility prediction methods.

Robust Video Streaming over MANET and VANET

2011 ◽  
pp. 170-200 ◽  
Author(s):  
Martin Fleury ◽  
Nadia N Qadri ◽  
Muhammad Altaf ◽  
Mohammed Ghanbari
Keyword(s):  
Ad Hoc Networks ◽  
Video Streaming ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Error Resilience ◽  
Peer To Peer ◽  
Mobility Patterns ◽  
Path Diversity ◽  
Challenging Environment ◽  
Hoc Networks

Mobile Ad Hoc Networks (MANETs) are a further step towards wireless networks with no or limited infrastructure and Vehicular Ad Hoc Networks (VANETs) extend this concept, introducing diverse mobility patterns but removing the need for battery power conservation. Video streaming and multimedia applications in general have become an engine of growth in wireless networking and this Chapter shows how video streaming can take place in this challenging environment. Error resilience and path diversity are presented as the key to robust streaming. The Chapter shows that simplified forms of multiple description coding are a practical route to take, with redundant frames in the temporal domain or Flexible Macroblock Ordering in the spatial domain offering preferred solutions. As a form of management of streaming, distributed sourcing via peer-to-peer streaming is experimented within VANET simulations. Error resilience methods, peer-to-peer streaming, and multi-path routing are reviewed. The Chapter considers the exploitation of path diversity over a MANET and a VANET. Path diversity allows the merging of the peer-to-peer concept with ad hoc networks. Future research directions are reviewed.

scholarly journals An Efficient Channel Access Scheme for Vehicular Ad Hoc Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Syed Asad Hussain ◽  
Muddesar Iqbal ◽  
Atif Saeed ◽  
Imran Raza ◽  
Hassan Raza ◽  
...  
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Ieee 802.11P ◽  
Transport Systems ◽  
Channel Access ◽  
Network Simulator ◽  
Distributed Coordination ◽  
Access Scheme ◽  
Hoc Networks

Vehicular Ad Hoc Networks (VANETs) are getting more popularity due to the potential Intelligent Transport Systems (ITS) technology. It provides many efficient network services such as safety warnings (collision warning), entertainment (video and voice), maps based guidance, and emergency information. VANETs most commonly use Road Side Units (RSUs) and Vehicle-to-Vehicle (V2V) referred to as Vehicle-to-Infrastructure (V2I) mode for data accessing. IEEE 802.11p standard which was originally designed for Wireless Local Area Networks (WLANs) is modified to address such type of communication. However, IEEE 802.11p uses Distributed Coordination Function (DCF) for communication between wireless nodes. Therefore, it does not perform well for high mobility networks such as VANETs. Moreover, in RSU mode timely provision of data/services under high density of vehicles is challenging. In this paper, we propose a RSU-based efficient channel access scheme for VANETs under high traffic and mobility. In the proposed scheme, the contention window is dynamically varied according to the times (deadlines) the vehicles are going to leave the RSU range. The vehicles with shorter time deadlines are served first and vice versa. Simulation is performed by using the Network Simulator (NS-3) v. 3.6. The simulation results show that the proposed scheme performs better in terms of throughput, backoff rate, RSU response time, and fairness.

An Efficient Data Dissemination Scheme for Warning Messages in Vehicular Ad Hoc Networks

2013 ◽  
pp. 308-327
Author(s):  
Muhammad A. Javed ◽  
Jamil Y. Khan
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Data Dissemination ◽  
Network Simulator ◽  
The Road ◽  
Warning Messages ◽  
On The Road ◽  
Hoc Networks

Vehicular ad hoc networks (VANETs) are expected to be used for the dissemination of emergency warning messages on the roads. The emergency warning messages such as post crash warning notification would require an efficient multi hop broadcast scheme to notify all the vehicles within a particular area about the emergency. Such emergency warning applications have low delay and transmission overhead requirements to effectively transmit the emergency notification. In this paper, an adaptive distance based backoff scheme is presented for efficient dissemination of warning messages on the road. The proposed scheme adaptively selects the furthest vehicle as the next forwarder of the emergency message based on channel conditions. The detailed performance figures of the protocol are presented in the paper using simulations in the OPNET network simulator. The proposed protocol introduces lower packet delay and broadcast overhead as compared to standard packet broadcasting protocols for vehicular networks.

scholarly journals An Efficient and Reliable Algorithm for Wireless Sensor Network

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8355
Author(s):  
Faheem Khan ◽  
Shabir Ahmad ◽  
Huseiyn Guruler ◽  
Gurcan Cetin ◽  
Taegkeun Whangbo ◽  
...  
Keyword(s):  
Sensor Networks ◽  
Ad Hoc Networks ◽  
Minimum Distance ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Wireless Sensor ◽  
Network Simulator ◽  
Battery Lifetime ◽  
Mobile Ad Hoc ◽  
Hoc Networks

In wireless sensor networks (WSN), flooding increases the reliability in terms of successful transmission of a packet with higher overhead. The flooding consumes the resources of the network quickly, especially in sensor networks, mobile ad-hoc networks, and vehicular ad-hoc networks in terms of the lifetime of the node, lifetime of the network, and battery lifetime, etc. This paper aims to develop an efficient and reliable protocol by using multicasting and unicasting to overcome the issue of higher overhead due to flooding. Unicasting is used when the desired destination is at a minimum distance to avoid an extra overhead and increases the efficiency of the network in terms of overhead and energy because unicasting is favorable where the distance is minimum. Similarly, multicasting is used when the desired destination is at maximum distance and increases the network’s reliability in terms of throughput. The results are implemented in the Department of Computer Science, Bacha Khan University Charsadda (BKUC), Pakistan, as well as in the Network Simulator-2 (NS-2). The results are compared with benchmark schemes such as PUMA and ERASCA, and based on the results, the performance of the proposed approach is improved in terms of overhead, throughput, and packet delivery fraction by avoiding flooding.

An Efficient Data Dissemination Scheme for Warning Messages in Vehicular Ad Hoc Networks

2011 ◽  
Vol 1 (4) ◽  
pp. 55-72 ◽  
Author(s):  
Muhammad A. Javed ◽  
Jamil Y. Khan
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Data Dissemination ◽  
Packet Delay ◽  
Network Simulator ◽  
Warning Messages ◽  
On The Road ◽  
Hoc Networks

Vehicular ad hoc networks (VANETs) are expected to be used for the dissemination of emergency warning messages on the roads. The emergency warning messages such as post crash warning notification would require an efficient multi hop broadcast scheme to notify all the vehicles within a particular area about the emergency. Such emergency warning applications have low delay and transmission overhead requirements to effectively transmit the emergency notification. In this paper, an adaptive distance based backoff scheme is presented for efficient dissemination of warning messages on the road. The proposed scheme adaptively selects the furthest vehicle as the next forwarder of the emergency message based on channel conditions. The detailed performance figures of the protocol are presented in the paper using simulations in the OPNET network simulator. The proposed protocol introduces lower packet delay and broadcast overhead as compared to standard packet broadcasting protocols for vehicular networks.

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