Dynamic Spectrum Sharing for Public Safety Networks
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Solution Overview
Problem
Current spectrum allocation policies lead to inefficient use of radio frequency spectrum, particularly in public safety networks, resulting in low average spectrum utilization, increased costs, and slower technological evolution due to lack of commercial partnerships for broadband LTE networks.
Innovation Solution
Implementing a method for sharing frequency carriers between public safety networks and commercial networks, where public safety network carriers are released for commercial use during low traffic or no emergency situations and reclaimed during emergencies, using processing circuits and communication interfaces to manage carrier availability and usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If public safety networks use dedicated frequency carriers exclusively, then reliability of public safety communication is improved, but spectrum utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic spectrum sharing where the allocation of frequency carriers between public safety networks and commercial networks changes based on real-time conditions. The network controller monitors traffic load and emergency status, dynamically assigning carriers to public safety networks during emergencies and releasing them for commercial use during normal periods, thus achieving both high reliability for public safety and high spectrum utilization efficiency
Solution Approach 2:
The system changes the operational status parameter of frequency carriers based on detected conditions. When an emergency situation is detected, the carrier allocation parameter is changed to reserve dedicated carriers for public safety networks. When no emergency is detected, the parameter is changed to release carriers for commercial use, thereby optimizing both reliability and spectrum efficiency through parameter adjustment
2Reliability
If public safety networks reserve dedicated frequency carriers, then service quality for emergency situations is improved, but network costs deteriorate
Solution Approach 1:
The network controller periodically monitors the operational status and traffic load of public safety networks. During non-emergency periods, frequency carriers are released for commercial use to reduce costs. During emergency periods, carriers are reserved for public safety to ensure service quality. This periodic monitoring and dynamic reallocation reduces overall network costs while maintaining emergency service quality
Solution Approach 2:
The system adjusts the carrier allocation parameter based on detected emergency status. When no emergency is detected, the parameter changes to release carriers for commercial use, reducing network costs. When an emergency is detected, the parameter changes to reserve carriers for public safety, ensuring service quality. This parameter-based dynamic allocation optimizes the trade-off between cost and service quality
3Speed
If public safety networks use dedicated frequency carriers, then technological evolution speed is improved, but spectrum efficiency deteriorates
Solution Approach 1:
The patent enables dynamic spectrum sharing that allows commercial networks to utilize public safety frequency carriers during non-emergency periods. This dynamic allocation accelerates technological evolution in commercial networks by providing access to additional spectrum resources, while still ensuring dedicated carrier availability for public safety networks when needed, thus maintaining both technological evolution speed and spectrum efficiency
Data Source
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Figure 3
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AI summary
The present disclosure relates to a method for sharing one or more frequency carriers of a public safety network (PSN) with a commercial network (CN). The method is performed in a PSN node, and comprises obtaining (610) information indicating a level of warning in the PSN, and determining (620) whether a PSNcarrier is available for use in the CN based on the obtained information. When it is determined that the PSN carrier is available for use in the CN, the method further comprises releasing (630) the PSN carrier from operation in at least one node of the PSN, and sending (640) information to a CN node indicating that the PSN carrier is available for use in the CN. The disclosure also relates to a corresponding method in a CN node, and to the PSN and CN nodes.