Over the Top Video: The Gorilla in Cellular Networks
Cellular networks have witnessed tremendous traffic growth recently, fueled by Smartphones, tablets and new high speed broadband cellular access technologies. A key application driving that growth is video streaming. Yet very little is known about the characteristics of this traffic class. In this paper, the authors examine video traffic generated by three million users across one of the world's largest 3G cellular networks. This first deep dive into cellular video streaming shows that HLS, an adaptive bit-rate streaming protocol, accounts for one third of the streaming video traffic and that it is common to see changes in encoding bitrates within a session.