Load balanced RPL (IPv6 Routing Protocol for LLN) multipath data transmission mechanism

Abstract

The invention relates to a load balanced multipath data transmission mechanism and belongs to the field of a wireless sensor network. The mechanism comprises the steps of (1), selecting the optimum multi-father node set of each node according to data transmission cost and finishing initial establishment of a network topology; (2), designing a multipath data traffic allocation metric standard, wherein various metrics such as wireless link quality, node residual energy, node cache occupation rates and the subnode number of relay nodes are effectively combined, under the condition of taking various metrics into consideration, influences of the various metrics on weight can be effectively reflected, and specific performance condition of various paths can be effectively evaluated; and (3), designing a traffic allocation strategy capable of maximally balancing network loads based on the traffic allocation metric standard, thereby obtaining the optimum data transmission scheme. According to the mechanism, the load balance can be maximally realized, the node energy consumption is effectively balanced, the network lifetime is prolonged, and the routing reliability is improved.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a multi-path data transmission mechanism based on multiple metrics. Background technique [0002] In recent years, with the rapid development of Internet of Things technology, Low Power and Lossy Networks (LLN) has become a research hotspot that has attracted much attention. LLN has a wide range of application scenarios, such as military reconnaissance, environmental monitoring, industrial control, smart home, healthcare, urban transportation, and building intelligence. LLN is composed of a large number of wireless sensor nodes, the storage capacity, processing power and energy of these nodes are limited, and the wireless link between nodes has lossy characteristics and instability, so based on the above characteristics of LLN and its extensive In view of the prospect of application, the Internet Engineering Task Force (IETF) proposed an IPv6-based low-power lossy network...

AI Technical Summary

Problems solved by technology

When the relay node detects that its optimal parent node has network congestion, it selects an alternative parent node for data offloading, but through the alternative parent node for data offloading, it can only temporarily solve network congestion and increase the number of control packets , affecting network performance

[0005] On the basis of multi-path, Zhang Zongjie et al. proposed a parallel transmission scheme for data traffic according to path weight. Data traffic distribution on the road, but the path considered is too single to effectively balance the load

[0006] Iova et al. proposed a multi-path RPL routing protocol that uses node life expectancy as the routing metric, and combines the traffic distribution strategy to make the energy consumption of each node the same, so that the energy consumption of the bottleneck node on each path is reduced, so as to achieve the extension The purpose of the network lifetime, but the energy consumption of each node is the same, which does not meet the actual scenario

[0007] Zhu Licai et al. proposed an energy-efficient RPL multi-path data distribution mechanism, established a node energy consumption model that fits the actual scene, and judged the energy balance degree of nodes in the network according to the energy dispersion degree measurement, thus effectively balancing the network. The energy consumption of the middle node, but only consider the discrete degree of energy measurement, without considering other factors, which is not conducive to the effective transmission of data packets

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