360-degree virtual reality video transmission system and parameter optimization method based on edge computing and active caching
An edge computing and virtual reality technology, applied in transmission systems, stereo systems, digital video signal modification, etc., can solve problems such as no system design, achieve the effects of reducing network bandwidth, improving experience quality, and reducing computing delay
Active Publication Date: 2022-03-25
ZHEJIANG UNIV
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Problems solved by technology
Although the above-mentioned documents or patents have proposed some solutions for the joint optimization of cellular network communication, edge caching, communication and computing resources for the problems in 360-degree mobile virtual reality video transmission, there is no comprehensive system design that can utilize the above-mentioned All technologies at the same time, considering video encoding, data storage and data transmission of core network and edge network
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[0039] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0040] Such as figure 1 As shown, the 360-degree mobile virtual reality video transmission system based on edge computing and active caching of the present invention includes a cloud server, an MEC server, a user head-mounted display, a multi-hop wired network from the cloud server to the MEC server, and a multi-hop wired network from the MEC server to the user. Single-hop wireless network, multi-hop wired and single-hop wireless network from cloud server to user.
[0041] Described cloud server comprises:
[0042] Video storage module, used for storage of 360-degree virtual reality video;
[0043] Tile encoding and compression module, used for equirectangular projection of 360-degree virtual reality video, divides it into N×M tiles, and compresses the ...
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The invention discloses a 360-degree virtual reality video transmission system based on edge computing and active buffering, which jointly considers video encoding, active buffering, computing offloading, data transmission and field of view prediction. The system of the present invention includes a cloud server, an MEC server, a client, a multi-hop wired network from the cloud server to the MEC server, a single-hop wireless network from the MEC server to the client, and a multi-hop wired and single-hop wireless network from the cloud server to the client. In order to solve the strict end-to-end delay problem in the virtual reality video service from the user sending a real field of view request to the user restarting to watch a new video block, the present invention uses the virtual reality user's field of view prediction to cache video data, and partially The decoding and rendering tasks are offloaded to the MEC server; in addition, the invention also discloses a system parameter optimization method to maximize the user experience quality.
Description
technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a 360-degree virtual reality video transmission system and a parameter optimization method based on edge computing and active caching. Background technique [0002] Mobile virtual reality is expected to become one of the killer applications of 5G in the future. It refers to the transmission of mobile virtual reality video and sound files from cloud servers to user terminal devices through multi-hop networks, so as to realize storage and rendering of cloud servers or edge servers. Virtual reality business; with the help of cloud computing technology and stable gigabit fiber optic network, the application has been proven to be practical. 360-degree video, also known as three-degree-of-freedom spherical video, can provide users with an immersive experience; since 360-degree mobile virtual reality video combines the high capacity of enhanced mobile broadband ...
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IPC IPC(8): H04N13/122H04N13/194H04N13/363H04N19/146H04N19/423H04N19/50H04L65/60H04L65/80H04L67/1097
CPCH04N13/122H04N13/194H04N13/363H04N19/423H04N19/50H04N19/146H04L65/80H04L67/1097H04L65/70
Inventor 翁其艳程琦单杭冠虞露张朝阳
Owner ZHEJIANG UNIV