Cross-Technology Waveform Signaling for Shared Spectrum
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing interference and spectrum utilization due to mismatched signal characteristics between different radio access technologies (RATs), particularly in hybrid sharing scenarios where devices may not be equipped with modems for both technologies, leading to increased collisions and inefficient spectrum use.
Innovation Solution
Implementing cross-technology signaling techniques that generate a waveform based on multiple RATs, allowing devices to transmit and receive signals using equipment designed for one RAT while compensating for signal mismatches and resolving bandwidth differences, thereby facilitating interference management and improved spectrum utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If devices transmit signals using equipment designed for one RAT only, then device complexity is reduced, but spectrum utilization efficiency deteriorates due to increased collisions and inability to communicate across different RATs
Solution Approach 1:
The patent introduces a waveform generator as an intermediary component that converts signals from one RAT format to another RAT format. This mediator enables devices with single-RAT equipment to communicate across multiple RATs by translating signal waveforms, thereby improving spectrum utilization without requiring devices to have multiple specialized modems for each RAT
Solution Approach 2:
The waveform generator provides multi-functional capability by supporting conversion between different RAT signal formats (e.g., OFDM to DFT-s-OFDM). This universal component allows a single device to handle multiple RAT types, eliminating the need for separate specialized equipment for each RAT while maintaining efficient spectrum utilization
2Adaptability or versatility
If devices are equipped with modems for multiple RATs, then adaptability across different technologies is improved, but device complexity and cost increase
Solution Approach 1:
The waveform generator serves as a universal component that can convert signals between different RAT formats (e.g., from first RAT to second RAT). This single multi-functional component replaces the need for multiple specialized modems, maintaining adaptability across different RATs while significantly reducing device complexity
Solution Approach 2:
The patent merges the functionality of multiple RAT-specific modems into a single waveform generator that handles conversions between different RAT signal formats. By combining these functions into one component, the system achieves multi-RAT adaptability without requiring separate hardware for each RAT
3Productivity
If signals from different RATs share the same spectrum, then spectrum utilization is improved, but interference between RATs increases due to mismatched signal characteristics
Solution Approach 1:
The waveform generator applies parameter changes to convert signal characteristics from one RAT format to another RAT format that is better suited for the target spectrum conditions. By transforming waveform parameters (such as modulation scheme, cyclic prefix, or subcarrier spacing), the system enables efficient spectrum sharing while reducing interference caused by mismatched signal characteristics
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may identify a waveform, the waveform generated based at least in part on a first radio access technology (RAT) and a second RAT. The wireless communication device may transmit a signal of the second RAT based at least in part on the waveform. Numerous other aspects are described.