Method for transmitting video packets in wireless local area network
A technology of a wireless local area network and a transmission method, which is applied in the field of video packet transmission in a wireless local area network, can solve the problems of reducing the probability of wireless channel competition and conflict, reducing the quality of video transmission, and failing to fully consider the difference in the importance of video packets, so as to improve the quality , the effect of reducing the probability of conflict
Inactive Publication Date: 2014-09-03
嘉兴市博豪家纺有限公司
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] When using a WLAN network to transmit video packets, the existing technology cannot fully consider the importance difference of the video packets, and at the same time reduce the probability of contention conflicts on the wireless channel
thereby degrading the quality of the video transmission
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] The present invention will be further described below in conjunction with drawings and embodiments.
[0028] Step 1: Calculate the distortion metrics of video frames and video packets;
[0029] Wherein, in the process of video transmission, different video packets have different degrees of importance. The invention uses the distortion measure to measure the importance of the video package, and the greater the distortion degree of a video package is, the more important it is. For example, a video data stream can be divided into reference frame video packets and non-reference frame video packets. The importance of reference frame video packets is greater than that of non-reference frame video packets. The more times a video frame is used as a reference frame, its importance Sex is also higher. References herein include both direct and indirect references. For example, suppose A, B, and C are three video frames, C is a non-reference frame, C uses B as a reference frame,...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for transmitting video packets in a wireless local area network. The method comprises the following steps: adjusting transmission order of the video packets, which are not transmitted, in a current queue according to a distortion measurement of video packets, a current queue information and a network state; distributing a maximum and a minimum of a contention window for the video packets of each frame according to the distortion measurement of a video frame; and then estimating the transmission time for each video packet and discarding the possible overtime video packet. By adopting the method provided by the invention, more important video packets in video data can be protected, so that the transmission quality is improved.
Description
technical field [0001] The invention relates to wireless communication technology, in particular to a method for transmitting video packets in a wireless local area network. Background technique [0002] Wireless Local Area Network (WLAN) usually adopts Distributed Coordination Function (DCF) protocol. According to DCF protocol, each node in the network uses Carrier Sense Multiple Access / Conflict Avoidance (Carrier Sense Multiple Access with Collision Avoidance, CSMA / CA) to access wireless channels competitively. The process of competitively accessing wireless channels generally includes: when a node has data to send, it first performs channel detection, and if the channel is idle, waits for the Distributed Interframe Space (DIFS) time to send data; if the channel is busy, Then start the backoff counter. The initial value of the backoff counter is a value randomly selected on the interval [0, CW]. CW is called the contention window. The value of CW is dynamically changed. T...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/06H04W84/12H04N21/2381H04N21/643
Inventor 王海东刘贵忠王秦立
Owner 嘉兴市博豪家纺有限公司