Multi-rate opportunistic routing method for wireless mesh network

Abstract

The invention provides a multi-rate wireless mesh network routing method for opportunistic forwarding based on characteristics of radio broadcasting, which comprises the following steps: after a node transmits data, a plurality of nodes are selected as forwarding nodes; in the early stage of network setup, the nodes acquire a direct link delivery fraction via probe packets and set up an adjacency relation; an adjacency matrix of the total network is set up by using link status packets to switch link information; a node forwarding probability analysis system model is used to deduce a measurement (integrated transmission number) applicable to the presence of arbitrary paths, and a forwarding node selection strategy and a forwarding strategy are established on the basis of the integrated transmission number; the optimal path algorithm is used to select a major path, the nodes closer to the destination node than the source node can be selected into a forwarding list, and the forwarding nodes can be confined to the vicinity of the major path according to a certain screening rule; the forwarding node closest to the destination node is set to have the highest forwarding priority, and the forwarding priority is lowered with the increase of the distance from the destination node; and the destination node transmits an end-to-end response to the source node based on a certain rule to inform the source node of the number of the received packets, and the source node performs adaptive regulation on the transmission rate according to the data.

Description

technical field [0001] The invention belongs to a routing method in the technical field of wireless network communication, in particular to a multi-rate opportunistic routing method for a wireless mesh network, using node forwarding probability to deduce the expected transmission number of any path, and designing forwarding nodes on this basis The selection method, and the routing method for multi-rate modulation in an adaptive manner. Background technique [0002] The rapid development of mobile communication has changed people's lives drastically and has become a highlight of network services. Common mobile networks usually appear in the form of cellular networks or wireless local area networks. In the cellular network, the communication between the mobile terminals must be completed by means of the transfer of the base station and (or) the mobile switch; in the wireless local area network, the mobile terminal is connected to the existing fixed network through the wireles...

AI Technical Summary

Problems solved by technology

Compared with wired channels, wireless channels are unreliable, changeable, and have a high packet loss rate. The classic wireless routing method has only one successor node, so it is easy to cause packet retransmission or trigger route reconstruction.

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