Blockchain Spectrum Coordination for GAA Interference Margins
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Solution Overview
Problem
The CBRS system faces challenges in managing interference thresholds for General Authorized Access (GAA) users sharing frequency bands with Priority Access License (PAL) users, leading to inefficient spectrum utilization and potential interference issues.
Innovation Solution
A dynamic spectrum sharing system utilizing blockchain technology for interference margin coordination among secondary users, where a first priority level secondary user and a second priority level secondary user dynamically utilize primary user spectrum resources, with smart contracts determining coordination content and interference thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple GAA users share the frequency band of PAL users to make full use of the frequency band, then spectrum utilization rate is improved, but interference threshold coordination becomes complex and difficult to manage
Solution Approach 1:
The patent introduces a spectrum coordination request mechanism where a requesting GAA user sends coordination requests to other GAA users occupying the same frequency band. These coordination requests include interference margin requirements, and the existing GAA users respond with their interference margin provisions. This intermediary coordination process manages the complexity of multi-user interference threshold coordination while enabling full spectrum utilization.
2Reliability
If all CBSD users send messages to the centralized SAS for spectrum allocation, then spectrum management is centralized and controlled, but the management pressure on SAS increases tremendously and single-point failure risk exists
Solution Approach 1:
The patent segments the centralized spectrum management function into distributed coordination among GAA users. Instead of all CBSD users communicating directly with the SAS, GAA users perform local interference coordination by exchanging coordination requests and responses with each other. This segmentation reduces the management burden on SAS while maintaining controlled spectrum allocation through the coordination mechanism.
3Adaptability or versatility
If a centralized Spectrum Access System (SAS) manages all spectrum allocation, then spectrum allocation is unified and coordinated, but the number of users increasing causes tremendous management pressure and single-point failure
Solution Approach 1:
The patent divides the centralized SAS management function into distributed GAA user coordination. Each GAA user independently performs interference margin coordination with other GAA users by exchanging coordination requests and responses. This segmentation creates multiple independent coordination nodes, eliminating the single-point failure risk of centralized SAS while maintaining unified spectrum allocation through standardized coordination protocols.
Solution Approach 2:
The patent enables GAA users to perform self-service interference coordination without constant SAS intervention. When a GAA user requests spectrum resources, it autonomously sends coordination requests to existing GAA users and processes their responses to determine interference margins. This self-service mechanism reduces dependency on centralized SAS, improving system reliability while maintaining coordinated spectrum allocation.
Data Source
AI summary
In a dynamic spectrum management apparatus, system, method, and computer program product first and second priority level secondary users dynamically use spectrum resources of a primary user. For second priority level secondary users, processing circuitry is configured to, based on blockchain, obtain a spectrum coordination request, acknowledged by a spectrum management apparatus, of another second priority level secondary user serving as a requester for the spectrum resources, wherein the blockchain at least comprises each second priority level secondary user, who is using or requests the use of the spectrum resources, serving as a node, and the spectrum coordination request indicates that the requester makes a request for the second priority level secondary user, who is using the spectrum resources, to perform coordination to provide an interference margin for the requester; and execute a first smart contract on the blockchain, so as to determine content of coordination to be performed.