Spectrum Management Device for CBRS Coexistence Networks
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Solution Overview
Problem
In CBRS coexistence networks using multiple radio access technologies, there is a challenge in balancing interference and optimizing spectrum utilization, particularly in allocating spectrum resources for secondary systems, as current standards do not adequately address spectrum division and guard band configuration.
Innovation Solution
A spectrum management apparatus generates an interference overlap graph to allocate spectrum resources for radio access networks, determining a spectrum resources allocation scheme for secondary systems based on this graph, thereby optimizing resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spectrum resources are allocated to multiple radio access networks using different RATs, then spectrum utilization is improved, but interference between networks increases
Solution Approach 1:
The spectrum band is segmented into multiple sub-bands and allocated to different radio access networks based on their specific requirements and interference characteristics. This allows multiple RATs to operate simultaneously in different frequency segments, improving overall spectrum utilization while controlling interference through spatial and spectral separation.
Solution Approach 2:
Different quality requirements and protection levels are applied to different parts of the spectrum based on the specific needs of each radio access network. Critical services receive higher protection with stricter interference limits, while less sensitive services operate with more flexible parameters, optimizing the trade-off between utilization and interference management.
2Object-generated harmful factors
If guard bands are allocated between secondary systems using different RATs, then interference is reduced, but spectrum resources are wasted
Solution Approach 1:
Instead of allocating full guard bands across the entire spectrum, the patent applies partial guard bands only where interference occurs between specific RAT networks. This selective approach maintains adequate interference protection while minimizing spectrum waste by allowing adjacent networks to utilize frequencies that do not cause harmful interference.
Solution Approach 2:
The guard band parameters are dynamically adjusted based on the specific RAT combinations, transmission powers, and channel conditions. By changing guard band width and positioning parameters adaptively, the system achieves optimal balance between interference suppression and spectrum efficiency for different network configurations.
3Productivity
If spectrum resources are dynamically allocated based on real-time conditions, then spectrum utilization is optimized, but system complexity increases
Solution Approach 1:
The system performs preliminary spectrum allocation based on predicted traffic patterns and historical data before actual demand occurs. This pre-allocation framework establishes baseline resource distribution that can be quickly adjusted in response to real-time conditions, reducing the computational complexity of dynamic allocation while maintaining high spectrum utilization.
Solution Approach 2:
The patent implements feedback mechanisms where network performance metrics are continuously monitored and used to adjust spectrum allocation decisions. This closed-loop control enables the system to adapt to changing conditions automatically, optimizing spectrum utilization without requiring complex centralized control for every allocation decision.
Data Source
AI summary
A spectrum management device, an electronic device, a radio communication method, and a storage medium. The spectrum management device is located in a coexistence system. The coexistence system includes at least two radio access networks using different radio access technologies. The spectrum management device includes a processing circuit, and is configured to: generate an interference overlapping graph for the coexistence system; and allocate spectrum resources for the at least two radio access networks according to the interference overlapping graph. By using the spectrum management device, the electronic device, the radio communication method, and the storage medium, spectrum resources can be reasonably allocated to a secondary system in the coexistence system comprising multiple radio access technologies.