Wireless sensor network flooding method based on BLE (Bluetooth Low Energy) mesh

Abstract

The invention belongs to the technical field of a wireless sensor network and discloses a wireless sensor network flooding method based on a BLE (Bluetooth Low Energy) mesh. New BLE advertisement packets are defined; in a hop count configuration phase, a sink node configures hop count values to the sink node for sensor nodes in a network; and in a data transmission phase, a flooding direction of the advertisement packets are restricted through utilization of the hop count values, so the advertisement packets are transmitted towards the sink node. Messages are effectively prevented from being forwarded blindly, the unnecessary relaying is reduced, and the energy consumption of the network is finally reduced. The method is applicable to the wireless sensor network based on the BLE mesh. According to the improved method, through combination of characteristics of a BLE technology, the messages are broadcasted and received through utilization of three advertisement channels. A new advertisement packet format is defined. Fields such as Hop are added. The hop count values to the sink node are configured for the sensor nodes, so the messages are forwarded towards the sink node. The blind flooding of the messages is restricted.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, in particular to a BLE mesh-based wireless sensor network flooding method. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Wireless Sensor Networks (WSNs), as one of the main technical forms of the underlying network of the Internet of Things, is a multi-hop self-organizing network system formed by large-scale deployment of sensor devices in the monitoring area and communicating with each other. The information is transmitted to the aggregation node or intelligent gateway through multi-hop routing, which lays the foundation for the realization of the Internet of Things and enables the continuous deepening of Internet of Things applications such as smart homes, wearable devices, and building automation. Bluetooth Low Energy (Bluetooth Low Energy, BLE) technology, as one of the short-distance communication technolog...

AI Technical Summary

Problems solved by technology

Although the traditional flood routing is simple to implement, it also has some shortcomings, because each intermediate node in the network that receives the message will blindly forward the message to its neighbor nodes, and each neighbor node forwards the message to its own neighbors , until the message reaches the target node, this will cause the same message to arrive through different paths, and excessive forwarding or even repeated forwarding is meaningless, which not only makes the data in the network highly redundant, but also causes the energy consumption of nodes to be too fast

[0003] In summary, the problems in the prior art are: In the traditional flooding method, the same message arrives at the same node through different paths, which will cause the message to be forwarded repeatedly, or even invalidly forwarded, causing a broadcast storm, making the data in the network highly redundant, and causing energy consumption to be too fast; it cannot be directly moved Used in BLE mesh network

Aiming at the problems existing in the prior art, the present invention provides a BLE mesh-based wireless sensor network flooding method, which solves the problem that BLE devices cannot be deployed in a large area for multi-hop transmission, and utilizes the Sink node to assign each node The hop value limits the excessive forwarding of sensor data in the network due to blind flooding, so that it is transmitted in the direction of the Sink node, improving the service life of the node

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