CBRS Interference Margin Allocation via Device Grouping
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Solution Overview
Problem
Current interference margin allocation methods in Citizens Broadband Radio Service (CBRS) are inefficient when multiple CBSDs communicate using various methods, leading to excessive operational restrictions and potential over-restriction of transmission power, especially in scenarios involving time division communication.
Innovation Solution
A communication control device and method that calculate cumulative interference power for synchronized communication device groups, determining interference margins to allow communication devices to operate within allowable interference levels, and dividing communication devices into groups to avoid mutual detection of radio waves, thereby optimizing frequency band utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current interference margin allocation methods are used for multiple CBSDs communicating using various methods, then radar protection is maintained, but frequency band utilization efficiency deteriorates and transmission power is excessively restricted
Solution Approach 1:
The patent divides communication devices into groups based on their communication methods and time resource synchronization. By segmenting devices into distinct groups (e.g., time-division communication devices, frequency-division communication devices), the system can calculate interference power separately for each group rather than treating all devices uniformly, thereby reducing excessive operational restrictions and improving frequency band utilization efficiency while maintaining radar protection.
Solution Approach 2:
The patent applies different interference margin allocation strategies to different groups of communication devices based on their specific communication characteristics. Each group receives customized interference margin calculations tailored to their communication method and time resource synchronization status, allowing optimized transmission power levels for each group rather than applying a one-size-fits-all restriction.
2Reliability
If all CBSD spectrum grants are considered as interference sources, then radar protection is ensured, but operational flexibility deteriorates
Solution Approach 1:
The patent segments CBSDs into different groups based on their communication methods and operational characteristics. By doing so, the system can selectively consider interference from relevant groups rather than all CBSDs uniformly, maintaining radar protection where needed while allowing operational flexibility for devices that do not pose interference risks.
Solution Approach 2:
The patent dynamically adjusts interference margin allocation based on the operational state and communication method of each device group. The interference power calculations are updated according to actual communication patterns, allowing the system to adapt to changing operational conditions while maintaining protection for radar and other primary systems.
Data Source
AI summary
[Problem] An interference margin allocation method in consideration of communication between communication devices is provided.[Solution] A communication control device of the present disclosure includes a calculator by which one or more first communication device groups for which a plurality of first time resources for communication are synchronized with each other calculate a first cumulative interference power, which is the sum of interference powers applied to a protection target system, in units of the first time resources, and a processor configured to determine an interference margin indicating an interference power allowable for communication devices of the one or more first communication device groups on the basis of the first cumulative interference power.