An adaptive multimedia streaming dissemination system for vehicular networks

• This work tackles several challenges for video streaming dissemination system in vehicular networks.
• The proposed system computes prefetched stream data for each user based on current situation of the users.
• A bandwidth reservation mechanism for premium user was proposed to ensure the QoS of stream data premium user received.
• A fuzzy logic inference system is utilized to determine if a BS or a vehicle can be chosen to transfer stream data.

An adaptive seamless streaming dissemination system for vehicular networks is presented in this work. An adaptive streaming system is established at each local server to prefetch and buffer stream data. The adaptive streaming system computes the parts of prefetched stream data for each user and stores them temporarily at the local server, based on current situation of the users and the environments where they are located. Thus, users can download the prefetched stream data from the local servers instead of from the Internet directly, meaning that the video playing problem caused by network congestion can be avoided. Several techniques such as stream data prefetching, stream data forwarding, and adaptive dynamic decoding were utilized for enhancing the adaptability of different users and environments and achieving the best transmission efficiency. Fuzzy logic inference systems are utilized to determine if a roadside base station or a vehicle can be chosen to transfer stream data for users. Considering the uneven deployment of BSs and vehicles, a bandwidth reservation mechanism for premium users was proposed to ensure the QoS of the stream data premium users received. A series of simulations were conducted, with the experimental results verifying the effectiveness and feasibility of the proposed work.

With rapid development of wireless technologies, the needs for the stream service on mobile devices are increasing nowadays. Playing live stream videos in the vehicle thus becomes possible via VANET and roadside BSs. However, there are still some difficulties to be overcome, such as the uneven distribution of roadside BSs, high mobility of vehicles, and volatile network environment. In this work, an adaptive seamless streaming dissemination system in vehicular networks is proposed to solve the above-mentioned problems. Comparing our proposed work with three latest researches, including MoPADS, WTSP, and NCBS schemes, the simulation results revealed that our mechanism achieved better performance in terms of packet loss ratio, service disruption time and throughput. The capability of self-adaptation in volatile vehicular environment assists in the effectiveness and practicability of our proposed approach.Figure optionsDownload as PowerPoint slide