Flexible UWB Channel Allocation for Interference Avoidance
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Solution Overview
Problem
Current ultra wideband (UWB) frequency hopping communication systems are limited in effectiveness due to restricted frequency band usage within each band group, leading to waste and interference when other licensed services occupy frequency bands, restricting the availability of band groups for frequency hopping.
Innovation Solution
A system and method for flexible channel allocation in UWB frequency hopping communication systems that allows communication through rapidly switching among specific band groups, such as band group 6 composed of the 9th, 10th, and 11th frequency bands, and enables the creation of new band groups by shifting frequency bands to optimize spectrum use, while minimizing interference by scanning and selecting optimal band combinations for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency hopping is confined within each band group according to current UWB PHY specifications, then compliance with existing standards is maintained, but frequency band availability is reduced and interference with licensed services cannot be avoided
Solution Approach 1:
The patent applies dynamics by making the band group configuration flexible rather than fixed. The system can dynamically select from multiple possible band group configurations (e.g., band groups of three adjacent bands or alternative combinations) based on real-time spectrum conditions, allowing adaptation to avoid licensed services while maintaining standard compliance through configurable rather than rigid band group definitions
Solution Approach 2:
The patent changes the parameter of band group composition from fixed specifications to variable configurations. By allowing different band group compositions (different combinations of frequency bands) and enabling parameter adjustments in the physical layer specifications, the system can optimize frequency band availability while maintaining compatibility with existing UWB standards through configurable parameters
2Object-affected harmful factors
If frequency bands are wasted when interfered by licensed services, then avoidance of interference is achieved, but spectrum utilization efficiency decreases
Solution Approach 1:
The patent applies preliminary action by performing spectrum sensing and band group selection before actual communication begins. The system scans available frequency bands, identifies bands occupied by licensed services, and pre-selects optimal band group configurations that avoid interference, thereby preventing wasted spectrum and maintaining high utilization efficiency while avoiding harmful interference
Solution Approach 2:
The patent introduces an intermediary mechanism of band group selection and switching that mediates between the need to avoid licensed services and the desire to utilize available spectrum efficiently. This intermediary layer allows the system to dynamically choose from multiple band group options, selecting paths that avoid interference while maximizing spectrum usage, rather than simply blocking all potentially interfered bands
3Length of stationary object
If transmission power is increased to enhance range, then communication range is extended, but average power density constraints may be violated
Solution Approach 1:
The patent applies segmentation by dividing the total transmission power across multiple frequency bands within a band group. Instead of concentrating power in a single band, the system segments the transmission across multiple bands (e.g., three adjacent bands), which allows achieving the desired total power for extended range while maintaining compliance with average power density constraints in each individual band
Data Source
AI summary
A system and method of flexible channel allocation in an ultra wideband frequency hopping communication system is disclosed. In one embodiment, a method includes communicating radio signals through rapidly switching among a band group 6 according to a hopping pattern. The method also includes scanning the ultra wideband spectra to determine the band group 6 based on the hopping pattern of the radio signals.In another embodiment, a method includes scanning ultra wideband spectra to eliminate any frequency band of the ultra wideband spectra from a list of available frequency bands when the any frequency band is currently used, selecting a band group in combination of two or more frequency bands to communicate radio signals with an optimal transmission power and/or maximum range, and communicating the radio signals through rapidly switching among the band group.