Dynamic Spreading Factor Selection for Control PHY Power Optimization
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Solution Overview
Problem
Conventional Control PHY designs with fixed spreading factors lead to high power consumption and inadequate performance in varying transmitting conditions, especially in low SNR environments required for Non-line-of-sight transmission and beamforming training.
Innovation Solution
A method and apparatus that dynamically selects a spreading factor from a plurality of options based on the transmitting condition using a spreading circuit, allowing for adjustable spreading to optimize signal-to-noise ratio and reduce power consumption, employing Barker sequences for efficient signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed spreading factor is used, then signal-to-noise ratio enhancement is provided, but power consumption increases unnecessarily in good transmitting conditions
Solution Approach 1:
The patent applies dynamics by making the spreading factor adjustable rather than fixed. The system dynamically selects from multiple spreading factors (4, 7, 13) based on current transmitting conditions, allowing the Control PHY to adapt between high reliability modes and low power consumption modes as needed.
Solution Approach 2:
The patent changes the parameter of spreading factor from a fixed value to a variable parameter that can take multiple values (4, 7, or 13). This parameter change enables the system to optimize between signal-to-noise ratio enhancement and power consumption based on actual transmitting conditions.
2Device complexity
If a fixed spreading factor is used, then implementation is simple, but adaptability to different transmitting conditions is poor
Solution Approach 1:
The system introduces dynamic adaptability by allowing the spreading factor to change based on transmitting conditions. The spreading circuit selects appropriate spreading factors from predefined options, providing adaptability while maintaining relatively simple implementation through structured decision logic.
Solution Approach 2:
The patent implements parameter changes by enabling the spreading factor to vary between multiple discrete values (4, 7, 13) depending on channel conditions. This provides versatility in handling different transmitting scenarios while keeping the implementation manageable through standardized parameter selection.
3Device complexity
If a fixed spreading factor is used, then the system is simple, but spectrum efficiency is not optimized
Solution Approach 1:
The patent optimizes spectrum efficiency by changing the spreading factor parameter based on transmitting conditions. Different spreading factors (4, 7, 13) provide different levels of SNR enhancement, allowing the system to achieve better spectrum efficiency in challenging conditions while maintaining simplicity in good conditions.
Data Source
AI summary
The present invention provides a method and an electronic apparatus for transmitting a packet with changeable spreading factor. The method comprises: utilizing a spreading circuit to select a spreading factor from a plurality of spreading factors according to a transmitting condition to adjust a spreading for the packet; and transmitting the packet. The electronic apparatus comprises: a spreading circuit and a transmitting circuit. The spreading circuit is utilized for selecting a spreading factor from a plurality of spreading factors according to a transmitting condition to adjust the spreading for the packet. The transmitting circuit is coupled to the spreading circuit, and utilized for transmitting the packet.