Multi-Path video streaming in vehicular communication: Approaches and challenges

Vehicular Ad-hoc Networks (VANETs) has witnessed significant attention from academia and industries, due to the growing number of applications and devices focusing on safety and efficiency in transportation. Video Streaming in Vehicular Communication (VSVC) presents interactive real-time view of an emergency incidence on roads. On-board unit of vehicles are utilized for streaming real time video of on road traffic, and disseminate among vehicles via Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) communication. VSVC is a challenging task due to the delay constrained nature of video data and dynamic vehicular network environment. Some of the fundamental issues in video streaming include queueing delay, bandwidth underutilization, and intermittent connectivity. Various techniques have been suggested in literature to address the issues in video streaming. To this end, this paper presents a qualitative review on multipath video streaming focusing on vehicular communication. Specifically, review of different multipath approaches with their comparative assessment are presented. Major challenges in multipath video streaming are identified as future directions of research. The review would benefit researchers and practitioners, in terms of enhancing clarity in multipath video streaming literature and emphasizing the issues.