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Title: Controle de qualidade de experiência para disseminação de vídeos em tempo real sobre redes ad hoc veiculares
metadata.dc.creator: QUADROS, Carlos Jean Ferreira de
metadata.dc.contributor.advisor1: CERQUEIRA, Eduardo Coelho
Keywords: Telecomunicações - Tráfego
Sistemas de comunicação sem fio - Controle de qualidade
Redes ad hoc (redes de computadores)
Protocolos de roteamento estatísticos
Qualidade de experiência
Issue Date: 24-Mar-2017
Publisher: Universidade Federal do Pará
Citation: QUADROS, Carlos Jean Ferreira de. Controle de qualidade de experiência para disseminação de vídeos em tempo real sobre redes Ad Hoc veiculares. 2017. 104 f. Tese (Doutorado) - Universidade Federal do Pará, Instituto de Tecnologia, Belém, 2017. Programa de Pós-Graduação Em Engenharia Elétrica.
Abstract: Live video dissemination over Vehicular Ad hoc Networks (VANETs) is fundamental for several services, e.g., roadside video emergency, advertisement's broadcast, and smart video surveillance. All these applications face many challenges due to stringent video quality level requirements, dynamic topologies, and broadcast environments. To deal with these challenges, as well as reduce network routing overhead, geographic Statistical Routing Protocols (SRPs) have been proposed as a suitable solution for the distribution of video flows in VANETs, usually by using positioning and Quality of Service (QoS) parameters. However, rather than only these parameters, a satisfactory video dissemination from the user's perspective also requires video and human-awareness issues. In real situations, due to different requirements and hierarchical structures of multimedia applications, network level and position parameters alone are not enough to select the best relay nodes and build up reliable routes to multi-hop video dissemination with satisfactory reachability and Quality of Experience (QoE) levels. This thesis focuses on improving the disseminated quality of on-road live videos in VANETs. Thus, we propose the cross-layer Broadcast Receiver-based and QoE-driven (BRQ) mechanism, which is modularly coupled to SRPs to offer QoE-aware and video-related parameters for the relay node selection and route maintenance. Thus, nodes decide for themselves to retransmit further the video sequences, enhancing the capacity of the system in delivering videos with better QoE assurance. On top of this, an application-level Error-Control (EC) scheme, namely Interleaving, allows mitigating the effects of frame loss. BRQ was added to a straightforward SRP built using the Distance method, named DBRQ protocol. Results show the gains of DBRQ compared to current SRPs, achieving video dissemination with QoE support, less routing overhead, and satisfactory reachability.
Appears in Collections:Teses em Engenharia Elétrica (Doutorado) - PPGEE/ITEC

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