Congestion Control Method and Wireless Mesh Network System

Abstract

The invention discloses a congestion control method, comprising: a second node monitors the data packets flowing through the node, and judges the congestion degree of the second node; when it is judged that the second node reaches the first congestion degree, the second node Sending a first congestion control request message to the first node, and sending a second congestion control request message to a third node; wherein, the first node is buffered on the transmission link of the data packet of the second node Hop node, the third node is the next hop node of the transmission link of the data packet buffered in the second node; after the first node receives the first congestion control request message, reduce the The data transmission rate of the second node; after the third node receives the second congestion control request message, it increases the amount of reserved resources for the second node. The invention also discloses a wireless mesh network system at the same time. The implementation of the invention can effectively avoid network congestion, improve network efficiency and improve the stability of wireless network transmission.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a congestion control method and a wireless mesh network system. Background technique [0002] Wireless Mesh Networks (Wireless Mesh Networks, WMN, wireless mesh network) is a self-organizing, self-configuring multi-hop wireless network. Compared with traditional WLAN, WMN has many advantages: (1) because only a few Wired network connection point (gateway), the wiring cost of the network is greatly reduced; (2) multi-hop wireless communication provides a wider wireless coverage; (3) multi-point to multi-point connection in the wireless backbone network enhances network connectivity Reliability; (4) Automatically establish and maintain connections between Mesh (mesh) nodes, which is easy for incremental deployment of the network, and the network has good scalability. [0003] The network structure of the wireless mesh network in the prior art is as follows figure 1 shown. Ther...

AI Technical Summary

Problems solved by technology

However, the above schemes do not fully consider the congestion. The main consideration is that the upstream nodes send data at high speed based on the channel competition mechanism, regardless of the network conditions of the downstream nodes, which leads to the delay in data forwarding of the downstream nodes and the formation of congestion.

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