Message forwarding method and device based on wireless mesh network

Abstract

The invention discloses a message forwarding method based on a wireless mesh network. The method comprises the following steps: receiving a first message sent by a physical layer of a wireless mesh node; determining whether the first message is a to-be-forwarded message; if so, searching a next hop address corresponding to a destination IP address in a pre-obtained routing table; re-packaging the first message according to the next hop address to obtain a second message; and sending the second message to the physical layer, so that the physical layer modulates the second message and sends the same to the next hop node through radio frequency. By application of the technical scheme provided by the embodiment of the invention, the message is directly forwarded on a data link layer, so that the forwarding delay can be shortened, the FPGA where the data link layer is located runs in parallel to ensure relatively strong search ability, and thus the CPU load is reduced by the routing search of the FPGA. The invention further discloses a message forwarding device based on the wireless mesh network, and the message forwarding device has corresponding technical effects.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a message forwarding method and device based on a wireless mesh network. Background technique [0002] A wireless mesh network includes multiple wireless mesh nodes. Each wireless mesh node is not only responsible for receiving and sending packets of the upper layer business of the node, but also responsible for forwarding the packets sent to other nodes to the next hop node. This requires The routing protocol determines the appropriate next-hop node according to the corresponding rules and repackages the message to send the message to the next-hop node. [0003] Traditional message forwarding is realized at the network layer through routing protocol software, commonly known as "three-layer switching". The file is sent to the network layer, and the network layer looks up the routing table according to the destination IP address of the message to determine whether the mess...

AI Technical Summary

Problems solved by technology

On the one hand, the multi-hop index of the voice will not meet the requirements. The delay that the high-quality voice service can tolerate is within 200 milliseconds. If the forwarding delay is too large, the delay will exceed 200 milliseconds, which greatly limits the distance of voice transmission; on the other hand, a large number of forwarded packets are uploaded to the CPU, and the routing protocol running in the CPU performs route search and forwarding, which increases the CPU load. If the CPU performance is low , processing a large number of forwarded packets will cause the CPU to freeze

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