A Fast Handoff Method for Mobile Nodes Oriented to 6tisch Networks

Abstract

The invention belongs to the technical field of IPv6 wireless sensor networks, and in particular relates to a method for fast handover of a mobile node facing a 6TiSCH network, which includes when the mobile node scans EB frames from a candidate parent node on a dedicated channel and broadcasts a DIS message to inform the candidate parent node of the mobile node Moving; after scanning and receiving EB on the dedicated channel, synchronize with the candidate parent node; continue to broadcast DIS request DIO information, and notify the candidate parent node to reduce the sending frequency of EB; after receiving the DIO message, the mobile node selects the target function according to the route, and selects Select the optimal parent node, select the RANK value of the optimal parent node and the random number together to calculate the communication channel with the optimal parent node, encapsulate the selected information into the DAO connection message, and send it to the new parent node; the mobile node receives After the DAO-ACK message of the new and old parent nodes, clear the old scheduling unit and establish a new connection; the invention can enhance the mobility of nodes in the 6TiSCH network, reduce the switching time of mobile nodes, and optimize the energy consumption of nodes. The reliability of the network is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of IPv6 wireless sensor networks, in particular to a method for fast switching of mobile nodes facing 6TiSCH networks. Background technique [0002] Wireless sensor network (WSN) plays an important role in the field of industrial automation due to its low power consumption, fast deployment and high efficiency. Among them, 6LoWPAN has the advantages of popularity, adaptability, more address space, support for stateless automatic address configuration, easy access, and easy development, but it still has shortcomings in network reliability and real-time performance. [0003] Therefore, IETF established the 6TiSCH working group on the basis of 6LoWPAN, and introduced the Time Slot Channel Frequency Modulation (TSCH) mechanism to improve the real-time performance and reliability of the network. TSCH adopts a method combining time slot regulation and channel frequency hopping to effectively combat multipath fadin...

AI Technical Summary

Problems solved by technology

[0005] In order to ensure the requirements of the 6TiSCH network for mobility support, and to solve the problem of time slot allocation and scheduling during the mobile process and the problems of large network access overhead and high network access delay, the present invention proposes a mobile node fast handover method for 6TiSCH networks, which specifically includes the following steps :

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