Low-power node synchronous wake-up method, node and system

Abstract

The invention relates to a low-power-consumption node synchronization awaking method, a node and a system thereof. The method comprises the following steps that a second node receives an awaking code broadcasted by a first node, and awaking / dormancy periods of the second node and the first node are equal; the second node calculates an initial time point for the first node to broadcast the awaking code according to the received awaking code, and the initial time point for the first node to broadcast the awaking code is an awaking time point t1 of the first node in one awaking / dormancy period; the second node calculates a time difference delta T1 of an awaking time point t2 of the second node in a current awaking / dormancy period and the awaking time point t1; and the second node adjusts the awaking time points of the second node in each awaking / dormancy period to be correspondingly consistent with the awaking time points of the first node in each awaking period according to the time difference delta T1 so that the second node and the first node are synchronously awakened. In the method, awaking time of each node in a network can be completely consistent so that synchronization awaking is maintained and power consumption of each node in the network is reduced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method, node and system for synchronously waking up a low-power node. Background technique [0002] Wireless Sensor Networks (WSN) is a distributed sensor network whose ends are sensors that can perceive and inspect the outside world. The sensors in the WSN communicate wirelessly, so the network setting is flexible, the location of the device can be changed at any time, and it can also be connected to the Internet in a wired or wireless manner. A multi-hop self-organizing network formed by wireless communication. [0003] In order to achieve precise perception of environmental information and ensure the effectiveness of node energy, collaborative sensing and data transmission between nodes has become one of the hot issues in sensor network research. [0004] For example: currently in the field of wireless remote meter reading, most of the wireless remote meter reading ...

AI Technical Summary

Problems solved by technology

[0004] For example: currently in the field of wireless remote meter reading, most of the wireless remote meter reading devices are powered by disposable lithium batteries and have a service life of more than 3 years because the equipment is restricted by the environment. Power consumption is quite sensitive, usually the sleep standby current is uA level, so these devices only wake up to work in a specific period of time, and continue to sleep after processing

However, in the meter reading network, the periodic wake-up time of each node device is different, that is, the working sequence is not synchronized. In this way, when the master node sends data to the slave node, it must first wake up the code until the slave node wakes up, the master node stops. Send the wake-up code and send the data immediately, and the length of the sent wake-up code depends on the wake-up time point of the slave node. If the slave node wakes up later, the wake-up code sent by the master node is longer, so it will inevitably cause power consumption of the master node. loss, which reduces the service life of the battery; similarly, when the slave node sends data to the master node, it will also cause a loss of power consumption of the slave node

Images