Wireless video low-delay transmission method under 5G network
A technology of wireless video and transmission method, which is applied in the field of 5G video transmission and can solve problems such as freezing
Active Publication Date: 2021-01-29
WUHAN YANGTZE COMM ZHILIAN TECH +1
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a wireless video low-latency transmission method under the 5G network. This method improves the real-time video caused by the frequent network switching of the high-definition video real-time monitoring terminal in the current 5G NAS networking environment. Transmission lag, high latency issues
This method combines wireless network switching with bit rate adjustment of real-time video transmission, predicts the network switching point according to the link quality of the current service network during the terminal movement process, and adjusts the data volume of video data transmission before the network link is switched , to achieve smooth switching, to ensure high-definition video as much as possible, to solve the problems of video freeze and high delay, and to improve the performance of video data transmission
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[0088] NSA network 5G network connection and switching process:
[0089] Under the 5G NSA network, the 5G NR control plane is anchored to 4G, and the 4G core network EPC is used. This architecture is called EN-DC, that is, EUTRA-NR dual connectivity architecture.
[0090] like figure 1 As shown, in the NSA network, the 4G base station (eNB) is the master node (Master Node), and the 5G base station (gNB) is the secondary node (Secondary Node).
[0091] like figure 2 As shown, on the user plane, that is, when transmitting data traffic, both 4G base stations and 5G base stations are directly connected to the 4G core network element S-GW; but on the control plane, that is, when performing signaling interaction for data transmission, only 4G The base station is directly connected to the 4G core network element MME. If the terminal wants to transmit high-speed data through the 5G base station, it needs to first connect to the 4G base station for signaling interaction. After the ...
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The invention relates to a wireless video low-delay transmission method under a 5G network. The method comprises the steps: combining wireless network switching and real-time video transmission code rate adjustment, collecting 5G signal quality sequences at different collection moments through a built-in wireless communication module in the terminal moving process, constructing a linear model of the 5G signal quality sequences, and determining the trend of the 5G signal quality sequence changing along with time by combining the correlation coefficient of the time sequence of the 5G signal quality sequence and the slope of the linear model of the 5G signal quality sequence to predict a network switching point, and starting wireless video terminal coding parameter switching judgment before anetwork link is not switched. The possible change of a channel is predicted in advance to adjust the video coding code rate, the video data transmission data volume is adjusted, preparation is made before network signal switching, stable switching is achieved, the problems of video lagging and high delay are solved under the condition that the video high definition is ensured as much as possible,and the video data transmission performance is improved.
Description
technical field [0001] The invention belongs to the technical field of 5G video transmission, and in particular relates to a wireless video low-delay transmission method under a 5G network. Background technique [0002] The development of communication technology has promoted the rise of wireless video surveillance technology, and the advancement of 4G and 5G network technology has also made streaming media technology more and more important. People have put forward higher requirements for video data transmission, especially the emergence of 5G network , which provides the possibility for high-speed communication, but there are currently two networking solutions, NSA (Non-Standalone Networking) and SA (Standalone Networking), and there are obvious differences between them. Under the NSA network, the 5G base station will use the existing 4G core network to save the construction of the 5G core network. The initial laying speed is fast and the cost is low. However, SA needs to ...
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IPC IPC(8): H04W36/00H04W36/30H04W36/32H04N19/164
CPCH04W36/0058H04W36/00837H04W36/0085H04W36/30H04W36/32H04N19/164
Inventor 黄莹巴继东黄琛何坤
Owner WUHAN YANGTZE COMM ZHILIAN TECH