Novel Technique in Multihop Environment for Efficient Emergency Message Dissemination and Lossless Video Transmission in VANETS

Vehicular ad hoc networks (VANETs) support safety- and non-safety-related applications that require the transmission of emergency safety messages and periodic beacon messages. The dedicated short-range communication (DSRC) standard in VANETs is used to exchange safety messages, and is involved in multi-hop data dissemination and routing. Many researchers have focused either on emergency data dissemination or routing, but both are critical. Routing protocols are commonly used for position-based routing and distance-based routing. This paper focuses on both emergency data dissemination and multi-hop routing, with the selection of the best data disseminator and trustworthy forwarder. To select the best forwarder, ring partitioning is performed, which segregates vehicles into rings based on the coverage area for routing. Each partition is selected with a best forwarder, which minimizes the hop count for data transmission. The work also includes effective video transmission for a user's request. Video transmission in VANETs is involved in this work to provide efficient video delivery between rapidly travelling vehicles with reduced delay owing to the selection of good-quality channels. Video transmission is prioritized according to frame types, and they are then transmitted with respect to the preference of channels. The major issue in video streaming is the loss of packets, which is our focus to minimize it. Our proposed VANET environment is simulated in OMNeT++, and the results show remarkable improvements in terms of the packet delivery ratio, end-to-end delay, and reliability.