Two-stage resource allocation method for guaranteeing QoE of video streaming service in WLAN

Abstract

The present invention provides a two-stage resource allocation method for guaranteeing QoE (Quality of Experience) of video streaming service in a WLAN (Wireless Local Area Network), which guarantees QoE of the video streaming service in a WLAN large user scenario through a two-stage resource allocation algorithm. A first-stage resource allocation algorithm is characterized by achieving resource allocation between an AP (Access Point) and background service users by adjusting a minimum contention window of the AP and the background service users, and a second-stage resource allocation algorithm is characterized by achieving resource allocation among video users by differentiating priorities of the video users. The two-stage resource allocation method of the present invention guarantees that downstream throughput acquired by the AP can meet download speed requirements of all video users by adoption of the first-stage resource allocation algorithm, and simultaneously guarantees that the video user with the highest priority can acquire video data at the quickest speed by adoption of the second-stage resource allocation algorithm, thereby avoiding a playing breaking incident when the video users in the WLAN watch HTTP video streaming service, and guaranteeing the QoE of the video streaming service.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a two-level resource allocation method. Background technique [0002] With the development and popularization of portable devices such as smart phones and tablet computers, people increasingly hope to use portable devices to access video websites to download and watch video streaming services through a wireless local area network (WLAN). At present, video streaming technology based on HyperText Transfer Protocol (HTTP) has become the main video technology adopted by mainstream video websites. Based on HTTP video streaming technology, users only need to download part of the video data to the buffer to realize video streaming Play while downloading. QoE (Quality of Experience) is defined as the user's degree of joy or dislike for a certain application or service, and is an important factor determining the success of a video service. For HTTP video streaming services, the pl...

AI Technical Summary

Problems solved by technology

This background technology is an application layer adjustment mechanism that is passively adapted to the network. However, in a WLAN with a large number of users, the total download rate of each video user is limited by the downlink throughput of the access point AP (AccessPoint) in the WLAN. , and the downlink throughput of the AP is affected by the uplink background business users, the download rate obtained by each video user may be lower than the minimum video bit rate of the video coded file slice, resulting in the rate of the downloaded video file cannot meet the video playback rate demand, and cause playback pause events and seriously affect the QoE of video streaming services

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