Reliable multicast transmission method of wireless mesh network

Abstract

The invention relates to a reliable multicast transmission method of a wireless mesh network, which realizes reliable multicast transmission of data in the wireless mesh network, achieves more once transmitting and saves wideband resources. The reliable multicast transmission method comprises the following steps: electing a multicast management main server and a backup server in the current time interval; transmitting a multicast address request to the multicast management main server from a source transmitting node and obtaining a multicast address and corresponding multicast parameters; transmitting a multicast joining notification to multicast personnel from the source transmitting node and ensuring the multicast joining notification into a multicast group, and obtaining information ofthe multicast group and the personnel according to the notification by a router and establishing a multicast router of the multicast group; transmitting multicast data by means of a finite state machine from the source transmitting node after personnel requests are received; transmitting a notification for exiting the multicast group to all personnel of the multicast group from the source transmitting node before the authorization time of the multicast address and related parameters is out, eliminating the using authorization of the multicast address and the related parameters by the multicast management main server, and ensuring the legality and the conformity of the multicast address and the related parameters.

Description

technical field [0001] The invention relates to the field of wireless network access, in particular to a reliable multicast transmission method for packet data in a wireless mesh network (WMN, wireless mesh network). Background technique [0002] The wireless mesh network is a large-capacity, high-speed, and wide-coverage wireless network based on the IP protocol. Through the mutual cooperation and collaboration between wireless access points distributed in a mesh, it is mainly reflected in the centerless, self-organizing, and multi-hop routing. Choice, etc., has become an effective means of broadband access. A wireless mesh network generally consists of user nodes, wireless mesh router nodes and gateway nodes. Wireless mesh routers are connected to each other through long-distance high-speed wireless technology to form a multi-wire wireless mesh backbone network. User nodes are connected to the mesh network through wireless mesh routers, and gateways are access points conn...

AI Technical Summary

Problems solved by technology

Due to the high reliability of wired network links, traditional TCP considers packet loss to be caused by network congestion, while in wireless networks, high bit error rates of links and node movement will lead to packet loss, multi-path routing and node mobility switching etc. will lead to out-of-order data packets. TCP does not consider packet loss caused by non-congestion out-of-order and high bit error rate. If traditional TCP is applied to a wireless network, TCP will non-congestion out-of-order and packet loss It is also used as a network congestion indicator, which incorrectly enters congestion control, which eventually leads to serious performance problems

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