Event-driven wireless sensor network clustering routing method and system

Abstract

The invention discloses an event-driven wireless sensor network clustering routing method. The method comprises the following steps: establishing a clustering network; constructing a multi-hop transmission link; guiding link search by adopting an estimation cost function, and obtaining a minimum transmission cost link; optimizing the link so as to reduce the link overhead of the link and obtain the minimum link overhead; in the data transmission stage, grading and gathering data importance to a cluster head, and performing emergency judgment at the cluster head end by adopting a sequential method; taking the link with the minimum transmission cost after optimization as a preferred link for data transmission, and sequentially transmitting the data from high to low according to the emergencydegree. The invention also discloses a network clustering routing system. The method has the advantages that the defects of network congestion, increase of node monitoring and processing expenditure,increase of implementation complexity and the like of a packet loss retransmission method in the prior art are overcome. The multi-path redundant transmission method has the advantages that the datatransmission quantity is increased, the congestion of the whole network is easy to form, the transmission cost ratio is low and the like.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to an event-driven wireless sensor network cluster routing method and system. Background technique [0002] At present, the reliable transmission of wireless sensor network monitoring data is a research hotspot, and it is also an important index to measure wireless sensor network. Since wireless sensor networks often need to be deployed in harsh environments to complete monitoring tasks, on the one hand, dynamic changes in network topology due to node failure or link congestion will affect the stability of data transmission; Factors such as temperature and humidity, noise, and geomagnetic disturbance in the deployment environment will also have a certain impact on the reliability of wireless sensor network transmission. Therefore, how to ensure that the sink node receives important key data in a timely and reliable manner in the wireless sensor network is an urgent...

AI Technical Summary

Problems solved by technology

Packet loss retransmission protocols, such as the RMST protocol with cross-layer design, propose a request retransmission mechanism at the MAC layer, and use hop-by-hop retransmission and end-to-end retransmission methods at the transport layer to ensure reliable transmission of large amounts of data. It ignores the problem of network congestion, and it is more complicated to implement; there is also an RBC protocol based on a virtual queue and a non-window block confirmation mechanism to maintain continuous data forwarding for network burst data aggregation, although this protocol solves the problem of increased channel competition. problem, but the overhead of data monitoring and processing is relatively large

Redundant transmission protocols such as the ReInForM protocol perform data backup during data transmission and open multiple paths for forwarding at the same time to ensure transmission reliability. Although the reliability of this protocol is high, it is easy to cause network congestion, and the transmission efficiency is low. high

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