Realization method of mapping mechanism based on mesh network video transmission ipb frame
A technology of implementation method and mapping mechanism, applied in the direction of digital video signal modification, selective content distribution, electrical components, etc., can solve the problems of poor video transmission picture and video service, video frames are not prioritized, etc., to achieve reliable service quality Effect
Active Publication Date: 2018-08-07
TAIYUAN UNIV OF TECH
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[0006] In order to solve the problem that video frames are not prioritized in wireless Mesh network multimedia video transmission, resulting in poor video transmission pictures and video services, the present invention provides a method for implementing a mapping mechanism based on Mesh network video transmission IPB frames
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[0024] A method for implementing a mapping mechanism based on Mesh network video transmission IPB frame, comprising the following steps:
[0025] (1) Determine the type of video frame. In wireless Mesh network video transmission, the multimedia video stream will choose its own appropriate path according to multiple hops. When the Mesh node receives the video data transmitted by the previous node, it must first check the video frame The type of frame is used to judge whether it is an I frame, a P frame or a B frame. In this system, according to the characteristics of the video, several frames of images are divided into a group of GOP, that is, a sequence. In order to prevent motion changes, the number of frames should not be too many, generally 10 or 12 frames as a group;
[0026] (2) If the video frame type is detected as an I frame, the Mesh node will consider whether to allocate an I frame to AC (3) for transmission according to the degree of congestion in AC (3). If there i...
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The invention relates to the field of a wireless self-organizing network and a mesh network, and particularly relates to a video IPB frame transmission mapping mechanism realization method based on a Mesh network. The method is used for enhancing video transmission frame and service quality in the large Mesh network. The types of video frames received by Mesh nodes are judged, and different priority mapping mechanism are adopted for different video frames so that priority transmission of the high-priority video frames is guaranteed. Meanwhile, congestion monitoring is performed in real time based on different Access Categories (AC), and the video frames can be reasonably mapped to the corresponding Access Categories AC. According to the video IPB frame transmission mapping mechanism realization method based on the Mesh network, the mapping mechanisms of the I, P and B frames can be adjusted in multi-hop transmission of the Mesh network according to the flow state of AC so that reliable service quality is provided to multimedia video transmission with large volume of data.
Description
technical field [0001] The present invention relates to the field of wireless ad hoc networks and mesh networks (referred to as wireless Mesh networks), specifically a method for implementing a mapping mechanism based on Mesh network video transmission IPB frames, which is used to improve the picture and image quality of video transmission in large-scale Mesh networks. service quality. Background technique [0002] With the increasing requirement of Internet access, the wireless Mesh network provides point-to-multipoint communication for "last mile" access. Compared with the general traditional Internet access wireless local area network (Wireless Local Area Network, WLAN), the wireless Mesh network has the advantages of rapid deployment, long-distance transmission, strong robustness, and high flexibility. At the same time, the rapid development of large-scale wireless Mesh network technology has been widely used in many fields such as traffic management, public security su...
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IPC IPC(8): H04N19/37H04N21/234H04N21/262
CPCH04N21/23418H04N21/26216
Inventor 赵菊敏朱飑凯李灯熬李纳
Owner TAIYUAN UNIV OF TECH