Robust Video Communication over an Urban VANET

This paper examines the threat to video streaming from slow and fast fading, traffic congestion, and channel packet drops. The proposed response is a combination of: rateless channel coding, which is adaptively applied; data-partitioned source coding to exploit prioritized packetization; and duplicate slice provision, which is the focus of the evaluation in this paper. The paper also considers the distribution of intra-refresh macroblocks as a means of avoiding sudden data rate increases. When error bursts occur, this paper shows that duplicate slices are certainly necessary but this provision is more effective for medium quality video than it is for high quality video. The percentage of intra-refresh macroblocks can be low and still reduce the impact of temporal error propagation.

Section: Slice Duplicationmentioning

confidence: 99%

Comprehensive Protection of Data-Partitioned Video for Broadband Wireless IPTV Streaming

Al-Jobouri

Fleury

Ghanbari

2012

“…Their characteristics in terms of flexibility and cost have made them the candidate technology for different applications such as rescue and military scenarios [14], information dissemination in vehicular networks [22], multimedia databases [1], or even video communication between peers [18]. However, even after a decade of research efforts, their ease-of-use is still quite low, making it a technology only accessible for experts.…”

Section: Introductionmentioning

confidence: 99%

Seamless MANET Autoconfiguration through Enhanced 802.11 Beaconing

Villanueva

Calafate

Torres

et al. 2013

Abstract. The deployment of mobile ad-hoc networks involves several configuration steps, which complicate research efforts and hinder user interest. This problem prompts for new approaches offering full autoconfiguration of terminals at the different network layers involved. In this paper we propose a novel solution for the autoconfiguration of IEEE 802.11 based MANETs that relies on SSID parameter embedding. Our solution allows users to join an existing MANET without resorting to any additional technology, and even in the presence of encrypted communications. Experimental testbed results using a real implementation of the proposed solution show that it introduces significant improvements compared to other existing solutions, allowing nearby stations to be configured in about two seconds, and also enabling multi-hop dissemination of configuration data to take place quickly and efficiently.

“…Such cooperative systems can greatly increase the quality and reliability of information available about the an extension of the physical billboards that allows drivers to download advertisements of interest using a location-sensitive distributed mechanism. Other applications such as RoadSpeak [39], which allows drivers to communicate on the road via voice chat messages, interactive online games [35], and video applications (video-phoning and teleconferencing) [36] might not be a driving force for VANET in the immediate future.…”

Section: Introductionmentioning

confidence: 99%

Cooperation as a Service in VANET: Implementation and Simulation Results

Mousannif

Khalil

Olariu

2012

Abstract. The past decade has witnessed the emergence of Vehicular Ad-hoc Networks (VANET), specializing from the well-known Mobile Ad Hoc Networks (MANET) to Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) wireless communications. While the original motivation for Vehicular Networks was to promote traffic safety, recently it has become increasingly obvious that Vehicular Networks open new vistas for Internet access, providing weather or road condition, parking availability, distributed gaming, and advertisement. In previous papers [27,28], we introduced Cooperation as a Service (CaaS); a new service-oriented solution which enables improved and new services for the road users and an optimized use of the road network through vehicle's cooperation and vehicle-to-vehicle communications. The current paper is an extension of the first ones; it describes an improved version of CaaS and provides its full implementation details and simulation results. CaaS structures the network into clusters, and uses Content Based Routing (CBR) for intra-cluster communications and DTN (Delay -and disruption-Tolerant Network) routing for inter-cluster communications. To show the feasibility of our approach, we implemented and tested CaaS using Opnet modeler software package. Simulation results prove the correctness of our protocol and indicate that CaaS achieves higher performance as compared to an Epidemic approach.