Antenna Control Unit for Wireless Node Sleep Mode
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Solution Overview
Problem
Wireless communication systems face challenges in accurately receiving wake-up commands when a responder node changes direction while in sleep mode, leading to disruptions in communication due to narrowed half-value and directivity angles.
Innovation Solution
A wireless communication system with an antenna control unit that sets the half-value angle to a larger value and a predetermined directivity angle when in sleep mode, allowing for improved reception of wake-up commands and accurate transitions between active and sleep modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the half-value angle and directivity angle of the antenna are narrowed to improve interference rejection and increase degree of freedom, then the ability to receive wake-up commands deteriorates when the responder node changes direction during sleep mode
Solution Approach 1:
The patent applies dynamics by making the antenna parameters (half-value angle and directivity angle) adjustable rather than fixed. The antenna control unit dynamically changes these parameters based on the operational mode: during active mode, the half-value angle is narrowed to φR for interference rejection, while during sleep mode, it is widened to a larger value to ensure wake-up command reception even if the node changes direction. This dynamic adaptation resolves the contradiction between interference rejection and reliable wake-up command reception.
Solution Approach 2:
The patent employs parameter changes by modifying the antenna's half-value angle and directivity angle according to the operational state. Specifically, the half-value angle is changed from a narrow value φR in active mode to a larger value in sleep mode, and the directivity angle is adjusted from a variable ΘR to a predetermined angle. These parameter changes enable the antenna to maintain broad coverage during sleep mode while achieving focused directional performance during active mode, thereby resolving the technical contradiction.
2Adaptability or versatility
If the half-value angle is narrowed to increase degree of freedom of directivity angle, then the coverage area of the antenna is reduced, making it difficult to receive signals when direction changes occur
Solution Approach 1:
The patent applies dynamics by making the antenna parameters (half-value angle and directivity angle) adjustable rather than fixed. The antenna control unit dynamically changes these parameters based on the operational mode: during active mode, the half-value angle is narrowed to φR for interference rejection, while during sleep mode, it is widened to a larger value to ensure wake-up command reception even if the node changes direction. This dynamic adaptation resolves the contradiction between interference rejection and reliable wake-up command reception.
Solution Approach 2:
The patent employs parameter changes by modifying the antenna's half-value angle and directivity angle according to the operational state. Specifically, the half-value angle is changed from a narrow value φR in active mode to a larger value in sleep mode, and the directivity angle is adjusted from a variable ΘR to a predetermined angle. These parameter changes enable the antenna to maintain broad coverage during sleep mode while achieving focused directional performance during active mode, thereby resolving the technical contradiction.
3Use of energy by moving object
If the responder node is in sleep mode with narrowed antenna angles, then energy consumption is reduced, but the ability to receive wake-up commands when direction changes occur deteriorates
Solution Approach 1:
The patent applies dynamics by making the antenna parameters (half-value angle and directivity angle) adjustable rather than fixed. The antenna control unit dynamically changes these parameters based on the operational mode: during active mode, the half-value angle is narrowed to φR for interference rejection, while during sleep mode, it is widened to a larger value to ensure wake-up command reception even if the node changes direction. This dynamic adaptation resolves the contradiction between interference rejection and reliable wake-up command reception.
Solution Approach 2:
The patent employs parameter changes by modifying the antenna's half-value angle and directivity angle according to the operational state. Specifically, the half-value angle is changed from a narrow value φR in active mode to a larger value in sleep mode, and the directivity angle is adjusted from a variable ΘR to a predetermined angle. These parameter changes enable the antenna to maintain broad coverage during sleep mode while achieving focused directional performance during active mode, thereby resolving the technical contradiction.
Data Source
AI summary
A wireless communication apparatus, which is capable of operating in an active mode and a sleep mode, comprises an antenna control unit, which controls a half-value angle and a directivity angle of an antenna for communication, and a mode control unit, which controls a change between the active mode and the sleep mode. When the wireless communication apparatus is in the sleep mode, the antenna control unit sets the half-value angle of the antenna to be a larger half-value angle than the half-value angle with respect to the active mode, and sets the directivity angle of the antenna to a predetermined angle.