Multi-mode Coexistence via Priority-Based Frequency Hopping
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Solution Overview
Problem
Multi-mode communication devices face interference issues due to coexistence of different communication modes, leading to degraded voice quality, reduced data transmission rates, and system congestion, which existing methods like frequency hopping struggle to address effectively, especially with complex and costly reception system requirements.
Innovation Solution
A method that sets priorities for frequency usage among communication modes, determines interfered channels, and performs frequency hopping for lower priority modes to avoid interference, simplifying the process and reducing implementation complexity and costs by actively identifying and mitigating frequency interference ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is performed based on received signal analysis, then interference evasion capability is improved, but reception system complexity and cost increase
Solution Approach 1:
The patent applies preliminary action by pre-storing the correspondence between channels and their frequency interference ranges in a lookup table before actual communication occurs. When frequency hopping is needed, the system simply queries this pre-computed table rather than performing complex real-time signal analysis, thus achieving interference evasion without requiring a complex reception system.
Solution Approach 2:
The patent segments the frequency spectrum into distinct channels with pre-determined interference ranges. By dividing the frequency domain into manageable segments and pre-calculating their interference characteristics, the system avoids the need for complex continuous spectrum analysis during operation, reducing reception system complexity while maintaining interference evasion capability.
2Reliability
If frequency hopping is performed based on received signal analysis, then interference evasion capability is improved, but implementation cost increases
Solution Approach 1:
The patent reduces implementation cost by performing the computationally intensive frequency interference range calculations in advance and storing the results. This eliminates the need for expensive real-time signal processing hardware and software during operation, making the interference evasion capability more economically feasible for commercial deployment.
Solution Approach 2:
The patent creates a simplified copy or representation of the frequency spectrum characteristics in the form of a lookup table containing pre-computed interference ranges. This abstracted representation allows the system to make intelligent frequency hopping decisions without requiring expensive copies of the full signal analysis capability, reducing implementation cost while maintaining effectiveness.
3Measurement precision
If complex reception system renovations are performed, then frequency hopping accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent achieves accurate frequency interference range analysis by pre-calculating and storing these values in a lookup table. This approach obtains precise interference range data through offline computation without requiring complex reception system renovations, as the accurate data is simply queried during operation rather than computed in real-time.
Solution Approach 2:
The patent extracts the computationally intensive frequency interference analysis function from the real-time reception system and moves it to a pre-processing stage. By taking out this complex analysis function and performing it beforehand, the patent achieves high measurement precision without requiring the reception system to be renovated with complex real-time analysis capabilities.
Data Source
AI summary
The present invention discloses a multi-mode coexistence method of a multi-mode communication device comprising steps of: setting priorities of frequency usage for all modes supported by the multi-mode communication device; determining a channel where a signal of a lower priority mode are interfered with by that of a higher priority mode; performing frequency hopping to outside said determined channel by the lower priority mode. The invention allows signals of various modes to coexist in the multi-mode communication device without modifying the existing RF reception system, and thus reduces the system cost and implementation complexity.