Page 113 - Kaleidoscope Academic Conference Proceedings 2022

Extended reality – How to boost quality of experience and interoperability

3. 5G NETWORK PEAK CONTROL Step 2, the platform initiates real-time streaming to the
TECHNOLOGY camera, and realizes the real-time preview of video
surveillance through a "streaming media service".
3.1 Technical architecture and workflow
Step 3, during the real-time video monitoring process, the
3.1.1 Architecture MEC obtains the parameter information and data flow
information of the front-end video equipment from the video
The core technology of the 5G network peak control management platform and the 5G network for the "I-frame
technology in the video transmission scenario is that the collision detection service" to detect the collision of the
video management platform obtains 5G base station network equipment's I-frames.
data through the MEC, and then determines whether there is
network congestion caused by I-frame collision when Step 4, the "I-frame collision detection service" performs I-
multiple video channels are concurrent. When an I-frame frame collision detection according to whether the I-frame
collision occurs, the camera's I-frame timing control is used transmission time period of the device (the time period from
to achieve the effect of staggered traffic, and to achieve 5G the start of I-frame transmission to the completion of
network peak control, so as to optimize the video transmission) coincides with the I-frame transmission time
transmission efficiency and improve the utilization of 5G period of other devices. When an I-frame collision is
wireless resources. The architecture is shown in Figure 3. detected, the "Network Peak Scheduling Service" is notified
- The technical architecture includes front-end to schedule the I-frame timing.
equipment, a 5G access network, MEC and video
management platform. Step 5, the "Traffic peak scheduling service" according to the
- The front-end video devices are surveillance video I-frame timing distribution of the group of front-end video
capture devices such as cameras, which support the ability to equipment, arranges the timing of the collision equipment,
adjust the timing of I-frames. decides the reasonable I-frame generation timing of the
- The 5G access network consists of wireless network front-end equipment that collides with the I-frame, and
facilities such as 5G base stations. manages the I-frame through the MEC and video
- In this technical architecture, the MEC connects the management platform interface notifying the "Network Peak
5G wireless network and the video management platform, Adjustment Policy Execution Service".
and provides 5G data forwarding services, I-frame collision
detection services, and network peak scheduling services. Step 6, the "Network Peak Adjustment Policy Execution
- The video management platform provides Service" issues I-frame adjustment command to the front-
equipment management services, streaming media services, end equipment through the 5G network to adjust I-frame
network peak adjustment policy execution services, etc. encoding timing of the equipment.
Video acquisition
devices Step 7, the front-end video equipment receives I-frame
5G access
Device 1 network MEC adjustment command and adjusts the generation timing of I-
frame, so as to achieve the time-sharing and off-peak sending
5G data I frame collision Network Peak
forwarding detection scheduling of I-frame.
Device 2
... 3.2 Key technologies
Media Device Media stream Network peak
Device N stream management control strategy
Video management In the network peak control technology process of the overall
platform
Protocol 5G video transmission scenario, the key technologies are the
MEC-based I-frame collision detection service and network
peak shift scheduling service, which have opened up the
Figure 3 – Diagram of peak control technology of 5G network data and video management system, and which have
video transmission network made full use of the MEC's open interface. The perception
capability of the network is linked with the video application
3.1.2 Workflow management, which enables better and more accurate rapid
policy adjustment based on network conditions.
The specific workflow of the technical solution is as follows:
3.2.1 I-frame collision detection service
Step 1, a group of front-end video equipment is connected to
the video management platform through a 5G wireless The I-frame collision detection service is mainly divided into
network and MEC data forwarding. Front-end video two steps: I-frame information collection and I-frame
equipment realizes device registration and synchronizes the collision detection.
time of front-end equipment through a "device management
service". I-frame information collection means that the video
management platform obtains the information of the front-
end equipment and the analysis result of the data stream by

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