Non-Uniform Frequency Band Allocation for Wireless Coexistence
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Solution Overview
Problem
The integration of multiple wireless communication technologies in a single device often results in adjacent channel interference due to their proximity in frequency bands, degrading performance for both the device and connected base stations.
Innovation Solution
A system comprising a controller and an arbiter that selects non-uniform frequency regions and channels for transceiving wireless signals, using protocols like Mobile Wireless Standards (MWS) and Industrial, Scientific and Medical (ISM) band protocols, to minimize interference by mapping channels into frequency regions and sub-regions with varying bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wireless communication technologies are integrated in a single device, then device functionality and versatility are improved, but adjacent channel interference occurs between technologies using nearby frequency bands
Solution Approach 1:
The frequency spectrum is segmented into multiple frequency regions with non-uniform bandwidths. The arbiter divides the available spectrum into distinct regions (e.g., first frequency region, second frequency region) and assigns different wireless technologies to different regions, thereby separating interfering signals while maintaining overall device functionality.
Solution Approach 2:
Different frequency regions are allocated with different bandwidth characteristics tailored to specific technology requirements. The first transceiver operates in a first frequency region with specific bandwidth properties, while the second transceiver operates in a second frequency region with different bandwidth properties, optimizing each technology's performance while minimizing interference.
2Ease of operation
If uniform frequency bands are used for multiple wireless technologies, then frequency allocation simplicity is improved, but interference between adjacent channels increases
Solution Approach 1:
The patent employs non-uniform frequency regions with asymmetric bandwidth allocations instead of uniform frequency bands. The first frequency region has a different bandwidth than the second frequency region, allowing optimal separation of adjacent channel technologies while reducing interference. This asymmetric allocation is managed by the arbiter which assigns specific channels within these non-uniform regions.
3Reliability
If frequency bands are allocated to minimize interference, then coexistence performance is improved, but frequency resource utilization efficiency may be reduced
Solution Approach 1:
The arbiter dynamically allocates frequency channels within the non-uniform frequency regions based on current operational conditions. The controller selects frequency regions and the arbiter selects specific channels, allowing the system to adaptively optimize both interference avoidance and resource utilization. This dynamic allocation enables efficient use of available spectrum while maintaining reliable coexistence.
Solution Approach 2:
The system changes the parameter of frequency region bandwidths from uniform to non-uniform. By varying the bandwidth parameters of different frequency regions, the system achieves better interference separation while still maintaining high overall resource utilization. The non-uniform bandwidth allocation allows tighter packing of frequency resources where interference is less likely, improving productivity without sacrificing reliability.
Data Source
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AI summary
Apparatus having corresponding methods and computer-readable media comprise: a first transceiver comprising a controller configured to select one of a plurality of frequency regions, wherein bandwidths of the frequency regions are non-uniform, and wherein the first transceiver is configured to transceive, according to a first protocol, first wireless signals in the one of the plurality of frequency regions selected by the controller; an arbiter configured to select one or more frequency channels based on the one of the plurality of the frequency regions selected by the controller; and a second transceiver configured to transceive, according to a second protocol, second wireless signals only in the one or more frequency channels selected by the arbiter.