Analysis of optimum substream lengths for dual TCP/UDP streaming of HD H.264 video over congested WLANs
Arul Dhamodaran, Kevin Gatimu, Ben Lee · 2017
Flexible Dual-TCP/UDP Streaming Protocol (FDSP) is a new method for streaming H.264-encoded High-definition (HD) video over WLANs. FDSP streaming is done in sequential video segments or chunks called substreams. Substreams are typically used in HTTP/TCP streaming for efficient switching between different quality levels of video. However, in FDSP, substream lengths are used to control the amount of TCP data that needs to be sent prior to the playback of that substream. Substream length choice also affects the corresponding amount of UDP data. This paper presents an analysis of substream length modification in the context of FDSP. Our results show that as substream length increases, TCP rebuffering time decreases while the number of TCP rebuffering instances increases. However, our results also show that substream length alone does not have a clear correlation with UDP packet loss.