Big video bearing solution

Tao Wenqiang
01 Nov 2016

Sponsored article

Big video, big future

Video has become the most favorite service of the users. The clear, vivid and smooth UHDV (Ultra High Definition Video) such as 4K, 8K, and VR (Virtual Reality) services have become the new demands, and opened up a big video era.

In big video era, the users’ video experience directly determines their satisfaction. The challenges to the bearer network are as follows:
Bandwidth challenge: The operators are introducing and developing 4K, 8K, and VR big video services, which will bring bandwidth increase by dozens of times. The High bandwidth requested by big video needs the bearer network capacity to increase by multiple times.

Delay and packet loss challenge: To guarantee 4K video service development, 4K TCP (Transmission Control Protocol) on demand service requires the delay from user to CDN (Content Delivery Network) edge node to be not higher than 21ms. The live video service asks for low packet loss ratio, while it’s hard for the network side to meet the requirements. 8K and VR services put forward much higher delay and packet loss requirements than 4K service does.

Others: Besides bandwidth, network delay and packet loss ratio, improvement in QoS (Quality of Service) and QoE (Quality of Experience) E2E intelligent monitoring and guarantee capability are also required.

ZTE big video bearing solution

As mentioned before, the traditional network architecture cannot meet the supreme experience demands of big video. The bearer network must be transformed. The future bearer network architecture that meets big video demands must have the three following features: high throughput, pooling resource and intelligent OAM. Based on the development of big video, the evolution of bearer network can be promoted in the following three phases:

Phase I – 4k video service initial stage; 2016 – 2017: Take optimization and fine tuning as the basic ideas in the existing network architecture. Quickly complete high-bandwidth coverage in family network and the whole Metro network. Deploy Level-2 CDN full coverage and hot spots deploy Level-3 CDN. Move multicast duplication points downward, and reduce metro network bandwidth consumption.
Phase II – 4k video service mature stage; 8K and VR introduction stage; 2018 – 2020: Introduce SDN (Software Defined Network)/NFV (Network Function Virtualization), implement edge DC (Data Center) reconfiguration, centralize and pooling the existing BNG (broadband network gateway) resources to make full sharing of BNG resources, and use switch to get access to the OLT (Optical Line Terminal). At the same time, deploy Level-3 CDN at edge DC. CDN can be deployed at OLT office based on demands in some hot spots. Implement storage of popular video openings on independent CDN device or OLT integrated with mini-CDN to implement access by the shortest path.
Phase III – 8k &VR mature stage; 2021 – 2025: Continue optimizing network architecture. Transform OLT office into ADC (Access DC). Upgrade OLT to support IPoE (IP over Ethernet) and make it gateway of big video service. Transparently transmit non-big-video-services to edge DC. Move OTN downward to ADC, connect ADC with CR and edge DC through OTN, so as to reduce network layers and realize flat network structure to reduce network TCO. Besides, promote key network component virtualization. Implement vBNG, vOLT, and vCDN. At the same time promote ADC and edge DC distributed cloud architecture to implement control and management from nearby.

Bearer network intelligent OAM integrated system

To make sure that the network can provide quality video service user experience, we need a set of index system to take quantitative evaluation of video service user experience. ZTE proposes a big video service user experience evaluation system called V-QoE, which is a video experience quality index system. Covering the whole E2E process, V-QoE takes an overall assessment of big video services in the four aspects of content source quality, network transmission quality, service platform, and terminal.

In the FBB and MBB scenarios, the intelligent bearer network OAM system can easily navigate from topology, alarm and performance views to the associated service management interface to take fault location and quick diagnosis for the designated dynamic service, fast and efficient check of dynamic service bearing can avoid some faults in advance.


ZTE bearing solution implements big network bearing in big video era. It realizes high bandwidth, low delay, low packet loss ratio, flattening, and intelligent network OAM of the big video bearer network. In this way it guarantees big video user experience, and enables the network to evolve toward SDN/NFV. It implements flexible scheduling capability of the whole network resource and help the operators build the bearer network that meets big video requirements.

Tao Wenqiang is Chief Engineer of ZTE Bearer Network

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