Adaptive Air Interface Waveform Parameter Adjustment
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Solution Overview
Problem
Existing wireless communication techniques are limited in adapting waveform parameters to changing center frequency and occupied bandwidth, and fail to reduce interference among nodes, especially in dynamic spectrum occupancy conditions.
Innovation Solution
Adjusting waveform parameters in response to both channel and spectrum conditions by estimating spectrum utilization and channel quality, allowing for dynamic adjustments in center frequency, occupied bandwidth, coding, and modulation to optimize communication links and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If waveform parameters are adjusted using known techniques to respond to link conditions, then link performance is improved, but the system cannot adapt to changing spectrum occupancy conditions and fails to reduce interference for surrounding nodes
Solution Approach 1:
The patent implements dynamic waveform parameter adjustment by continuously monitoring spectrum occupancy conditions and adapting transmission parameters in real-time. The system transitions from static parameter configuration to dynamic adaptation, allowing the waveform parameters to change based on current spectrum conditions, thereby resolving the contradiction between maintaining reliable link performance and adapting to changing spectrum occupancy.
Solution Approach 2:
The patent applies parameter changes by modifying waveform parameters such as center frequency, bandwidth, and modulation scheme based on detected spectrum occupancy conditions. This enables the system to adapt to changing spectrum environments while maintaining link reliability, directly addressing the limitation of known techniques that cannot adjust to spectrum occupancy changes.
2Reliability
If waveform parameters are adjusted to improve link performance, then communication reliability is enhanced, but interference to and from surrounding nodes increases
Solution Approach 1:
The patent applies local quality by adjusting waveform parameters specifically for each transmission based on local spectrum occupancy conditions. Instead of using uniform parameters for all transmissions, the system tailors parameters to the specific spectral environment, allowing reliable communication in occupied bands while minimizing interference in adjacent bands where surrounding nodes operate.
Solution Approach 2:
The patent implements feedback mechanisms where the system continuously monitors spectrum occupancy conditions and uses this information to adjust waveform parameters. This closed-loop approach ensures that transmissions are optimized for current conditions while automatically reducing interference when spectrum conditions indicate the presence of surrounding nodes, thus resolving the contradiction between reliability and interference generation.
3Adaptability or versatility
If the system adapts to changing conditions by adjusting waveform parameters, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining a set of allowable waveform parameters and adaptation rules before operation. This allows the system to adapt to changing conditions using a controlled, predefined parameter space rather than requiring complex real-time optimization algorithms, thereby reducing device complexity while maintaining adaptability to spectrum occupancy changes.
Data Source
AI summary
Adjusting parameters of a waveform includes facilitating wireless communication between a transmitting node and receiving nodes, where the transmitting node communicates with a receiving node over a channel. Spectrum conditions are estimated, where a spectrum condition describes spectrum utilization in the vicinity of surrounding nodes. Channel conditions are estimated, where a channel condition describes a channel of the plurality of channels. Waveform parameters are adjusted in response to the spectrum conditions and the channel conditions.