A Routing Method for Wireless Sensor Networks Based on Link Quality and Residual Energy

Abstract

The invention relates to a wireless sensor network routing selection method based on link quality and residual energy, which uses link quality indicators to judge whether the link quality is good or bad, and selects links with better link quality between sensor nodes to perform The sending of data packets and the comprehensive consideration of the remaining energy of nodes avoid the excessive use of a single node in other algorithms, balance the load of the entire wireless network, and improve the life and quality of service of wireless sensor networks.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a wireless sensor network routing method based on link quality and residual energy. Background technique [0002] Wireless sensor network is an emerging network, which consists of multiple single nodes, each node interacts with the environment through sensing or parameter control; nodes must be related to each other to complete certain tasks, while a single node usually Does not work; the association between nodes is achieved through wireless communication. [0003] When a source node in a wireless sensor network needs to send data packets to its destination node, if the source node cannot directly send data packets, it can only rely on the help of intermediate nodes to forward these data packets, thus forming a Multi-hop network. The routing layer routing protocol determines the forwarding strategy through the proposed routing algorithm. In wired networks, ro...

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Problems solved by technology

[0004] The first aspect is in the application of wireless sensor networks, because the sensor nodes are difficult to connect with the wired power supply, but must rely on their own batteries for power supply, so energy efficiency is a very important indicator, the existing wireless network routing protocols do not consider Energy efficiency issues; the second aspect is that wireless sensor network applications are closely related to environmental factors. Due to the variability of environmental factors, wireless sensor network applications have high requirements for quality of service (QoS). Therefore, the stability and reliability of routing protocols It is also two very important indicators, and the existing wireless network routing protocols do not consider these two points

The third aspect is that in wireless sensor network applications, since the communication between nodes may be permanently interrupted due to factors such as node energy exhaustion and node damage, wireless sensor network nodes usually need redundant deployment. Existing wireless network routing protocols fault tolerance is not considered

[0005] To sum up, the existing table-driven and on-demand routing protocols do not consider the limited energy of wireless sensor network nodes and the impact of environmental factors, and cannot meet the requirements of high energy usage and high quality of service in wireless sensor networks.

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