Spectrum Access System Resource Management in Dense CBRS Networks
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Solution Overview
Problem
Conventional Spectrum Access Systems (SAS) are inadequate in managing resources in dense CBRS networks, failing to effectively account for factors like geographical overlap, bandwidth usage, and interference, particularly in scenarios with multiple CBRS networks and overlapping channels.
Innovation Solution
Implementing a Spectrum Access System (SAS) that coordinates with CBRS access points (APs) and a Digital Network Architecture center (DNA-C) to manage resource allocation based on policies, inter-AP coordination, comparative performance indicators, and physical cell identifiers, enabling dynamic channel management and conflict resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional SAS manages CBRS spectrum resources, then basic spectrum access is provided, but resource allocation fails to account for geographical overlap, bandwidth usage, and interference in dense networks
Solution Approach 1:
The patent introduces a DNA-C (Digital Network Architecture Center) as an intermediary component between the SAS and CBRS access points. The DNA-C receives resource allocation requests from access points, evaluates them against multiple criteria including geographical overlap, bandwidth usage, and interference levels, and returns optimized allocation decisions. This intermediary structure enables sophisticated resource management while keeping the core SAS architecture relatively simple.
Solution Approach 2:
The resource management function is segmented into multiple independent evaluation criteria: geographical overlap assessment, bandwidth usage analysis, interference level calculation, and policy-based prioritization. Each criterion can be independently weighted and evaluated, allowing the system to handle complex dense network scenarios through modular decision-making components.
2Reliability
If dynamic channel management is implemented for seamless transitions, then network reliability improves, but management complexity increases
Solution Approach 1:
The system performs preliminary actions by pre-evaluating potential channel transitions and preparing transition parameters before actual channel switching occurs. The DNA-C assesses available channels and their suitability in advance, maintaining a ready state for seamless transitions when needed, thereby reducing the complexity of real-time decision-making.
Solution Approach 2:
The patent implements feedback mechanisms where the DNA-C continuously monitors network conditions, access point status, and channel utilization. This feedback information is used to dynamically adjust channel allocations and trigger seamless transitions when optimal conditions arise, making the complex channel management process automated and adaptive rather than manual and rule-based.
3Productivity
If multiple CBRS networks with overlapping channels are deployed, then network coverage and capacity increase, but interference between networks worsens
Solution Approach 1:
The patent applies local quality by evaluating and managing channel resources differently for different geographical locations and network contexts. The DNA-C considers location-specific factors such as physical distance between access points, local interference patterns, and network-specific policies when making channel allocations, allowing optimized resource utilization in each local area while minimizing overall interference.
Solution Approach 2:
The system manages interference by dynamically changing operational parameters of CBRS access points, including transmit power levels, channel bandwidth, and time-frequency resource assignments. The DNA-C adjusts these parameters based on real-time network conditions and interference measurements, enabling multiple networks to coexist with overlapping channels while maintaining acceptable interference levels through parameter optimization.
Data Source
AI summary
Systems, methods, and computer-readable media for improving resource management in Citizens Broadband Radio Service (CBRS) networks include a Spectrum Access System (SAS) in coordination with one or more CBRS devices (CBSDs) and a Digital Network Architecture center (DNA-C). Resource allocation decisions can be based on one or more policies such as a priority, a preemption capability index and/or a preemption vulnerability index associated with the CBSDs. Resource allocation can also be based on inter-access point (AP) coordination between two or more CBSDs and comparative performance indicators of the two or more CBSDs. Managing interference between two or more groups of CBSDs can be based on the inter-AP coordination and group identifiers associated with the two or more groups. Bandwidth allocation can be modified to the two or more CBSDs and seamless transition can be implemented using timers.