Sensor Node Wake-Up Mechanism for Wireless Data Transmission
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Solution Overview
Problem
In wireless sensor networks, sensor nodes must wait for an active period of a superframe to exchange data with network nodes during inactive periods, leading to increased data transmission delays.
Innovation Solution
A method and device that allow network nodes to send wake-up messages to sensor nodes in inactive periods, enabling them to transition to a wake-up state without waiting for the next active period, using wake-up pulses and frames to synchronize data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If sensor nodes enter dormant state during inactive period to reduce energy consumption, then energy efficiency is improved, but data transmission delay increases
Solution Approach 1:
The network node performs preliminary action by sending a wake-up message to the sensor node before the inactive period begins. This allows the sensor node to transition from dormant state to active state in advance, enabling data transmission during the inactive period without waiting for the next active period, thus reducing transmission delay while maintaining energy efficiency
Solution Approach 2:
The system dynamically adjusts the operational state of sensor nodes based on data transmission requirements. During inactive periods, sensor nodes can be temporarily activated from dormant state when data transmission is needed, and return to dormant state afterward. This dynamic state transition allows the system to balance energy consumption and transmission delay adaptively
2Speed
If sensor nodes remain in woken-up state during active period to enable immediate data transmission, then data transmission speed is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic action by dividing time into active periods and inactive periods. During active periods, sensor nodes are in woken-up state for immediate data transmission. During inactive periods, sensor nodes enter dormant state to conserve energy. This periodic alternation between active and inactive states allows the system to achieve both fast transmission speed and low energy consumption at different time intervals
Data Source
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AI summary
Embodiments of the present invention provide a data transmission method and device. The data transmission method of the present invention includes: determining, by a network node, that a destination sensor node of to-be-transmitted data is in an inactive period; sending, by the network node, a wake-up message to the destination sensor node, where the wake-up message is used to trigger the destination sensor node to enter a woken-up state from a dormant state of the inactive period; receiving, by the network node, a response message that is from the destination sensor node and for the wake-up message; and performing, by the network node, data transmission with the destination sensor node according to the response message. According to the embodiments of the present invention, a data transmission delay is reduced, and data transmission synchronization is ensured.