Buffering queue management method for wireless LAN

Abstract

The invention provides a buffer queue management method used in a wireless local area network. In the wireless local area network, when related sites have large quantity and large data amount, network congestion phenomenon can happen. In order to detect the network congestion before the congestion happens or at the beginning period that the congestion happens, the in-queue detection of a data packet is realized by the buffer queue management method of exchanging nodes (such as AP), and a sending end is notified with the congestion by packet loss or setting an explicit congestion notification (ECN) of an IP packet head, so as to relieve the network congestion. The buffer queue management method provided by the invention uses the queue length and flux speed as congestion measurement, so that the invention can evaluate the network congestion degree more exactly, and the invention calculates different packet loss probability for each queue according to the priority difference of buffer queues to realize the random packet loss according to different priorities, so as to achieve the goal of distinguishing packet loss rate.

Description

technical field [0001] The invention relates to a buffer queue management method in the field of wireless network communication, in particular to a buffer queue management method using a rate estimation value and an instantaneous queue length value as a congestion measure. Background technique [0002] In a wireless local area network, when the number of associated stations is large and the amount of data is large, network congestion will occur. The congestion phenomenon of WLAN stems from the unbalanced distribution of network resources and network traffic. Specifically, at each forwarding node, the arrival rate of network traffic is greater than the output bandwidth of the link, resulting in the accumulation of packets in the queue, improving the local network Processing power cannot eliminate congestion. Ideally, there should be a slight accumulation of packets in the queue, which means that the arrival rate of traffic is slightly greater than the link processing capacit...

AI Technical Summary

Problems solved by technology

Since random early detection only evaluates the degree of congestion based on the average length of the queue, the main problem is that it is slow to respond to congestion caused by burst traffic and is sensitive to parameter settings.

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