Abstract
An exponential increase in mobile video delivery will continue with the demand for higher resolution, multi-view and large-scale multicast video services. Novel fifth generation (5G) 3GPP New Radio (NR) standard will bring a number of new opportunities for optimizing video delivery across both 5G core and radio access networks. One of the promising approaches for video quality adaptation, throughput enhancement and erasure protection is the use of packet-level random linear network coding (RLNC). In this review paper, we discuss the integration of RLNC into the 5G NR standard, building upon the ideas and opportunities identified in 4G LTE. We explicitly identify and discuss in detail novel 5G NR features that provide support for RLNC-based video delivery in 5G, thus pointing out to the promising avenues for future research.
Highlights
Mobile video delivery continues its growth in volume and will reach an estimated 78% of the total mobile data traffic by 2021, compared to 60% in 2016 [1]
In parallel with the review of random linear network coding (RLNC), we provide an in-depth overview of mobile video delivery, focusing on unicast and multicast/broadcast mobile video services over fourth generation (4G) Long-Term Evolution (LTE) network [9,23,24,25]
Analysis shows that around 80% of total mobile streamed video is delivered in adaptive bitrate streaming (ABR) format while the rest is delivered in progressive downloading (PD) format. 70% out of total mobile streamed video is delivered in encrypted format by using HTTPS or Quick UDP Internet Connections (QUIC) transport, where e.g., QUIC protocol is used for Youtube content
Summary
Mobile video delivery continues its growth in volume and will reach an estimated 78% of the total mobile data traffic by 2021, compared to 60% in 2016 [1]. In parallel with the review of RLNC, we provide an in-depth overview of mobile video delivery, focusing on unicast and multicast/broadcast mobile video services over fourth generation (4G) Long-Term Evolution (LTE) network [9,23,24,25]. We provide possible directions for optimizing mobile video delivery and integrating RLNC sublayer within upcoming 5G NR standard. We conclude this overview paper by explicitly identifying and discussing in detail novel 5G NR features that could provide support for RLNC-based video delivery in 5G, pointing out to the promising avenues for future research.
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