RPL routing method based on bidirectional father node decision

Abstract

The invention belongs to the technical field of wireless sensor network communication, and provides an RPL routing method based on bidirectional father node decision. The RPL routing method comprisesthe following steps of: selecting an optimal father node according to routing metrics of all candidate father nodes by a child node; after consulting information is carried through an M-DAO message and the optimal father node receives the M-DAO message transmitted by the child node, judging whether to establish connection with the child node or not according to the information carried in the M-DAOmessage and the current network condition of the optimal father node; and finally, completing networking. According to the RPL routing method, the optimal father node is selected through an optimal father node selection mechanism, so that the probability that the node with heavy link load is selected as the father node is avoided, and meanwhile, a large number of child nodes are prevented from being connected to the node; and secondly, through adopting the bidirectional father node decision mechanism, the data processing capacity of the father node is considered, and the thunder effect causedby the fact that DIO messages cannot finally reflect the connection condition of the node is relieved.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor network communication. Specifically, for a low-power lossy network routing protocol (Routing Protocol for LLN, RPL), a RPL routing method based on bidirectional parent node decision-making is proposed. Background technique [0002] Due to the instability of wireless links in wireless sensor networks, the energy and processing capabilities of nodes in the network are limited. Therefore, in order to better meet the application requirements, low-power lossy networks have attracted widespread attention. However, traditional routing protocols such as: Ad Hoc On-Demand Distance Vector Routing (AODV for short), Optimized Link State Routing (OLSR for short) and other routing protocols are relatively expensive. big. For this reason, the (Routing Over for Low Power and Lossy Networks, ROLL for short) working group in the IETF proposed the RPL routing protocol in 2012. The RPL routing protocol can ...

AI Technical Summary

Problems solved by technology

A thundering effect occurred at node 2, resulting in the rapid consumption of network resources at node 2, while the network resources at node 1 and node 3 were not fully utilized

[0012] In summary, there are problems in the existing technology that the routing metrics cannot comprehensively reflect the network status of the candidate parent node and the thundering effect caused by the child node uniquely determining the optimal parent node selection mechanism.

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