Central Management Server for Special Communication
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Solution Overview
Problem
Rural regions face limitations in implementing special communication due to the lack of availability of high-frequency services, necessitating a more efficient frequency management system for quick and reliable communication.
Innovation Solution
A central management server and access method that utilize existing communication networks by acquiring spectrum sensing information, generating OP values for channel allocation, and determining communication modes to ensure high-speed and reliable special communication, even in areas with limited service availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated communication networks are used for special communication, then reliability is improved, but device complexity and infrastructure requirements increase
Solution Approach 1:
The patent enables special communication (second layer) to operate over existing public communication networks (first layer) by implementing a multi-layer channel allocation system. The central management server allows the same communication infrastructure to serve both public and special communication needs simultaneously, eliminating the requirement for dedicated physical networks while maintaining reliability through priority-based access control and interference management mechanisms.
2Device complexity
If existing communication networks are utilized for special communication, then device complexity is reduced, but communication speed and reliability deteriorate due to shared resources
Solution Approach 1:
The patent implements dynamic channel allocation where the central management server continuously monitors channel usage and interference levels, then adjusts channel assignments in real-time based on current network conditions. When special communication is detected, the system dynamically reallocates channels to prioritize second layer traffic, ensuring high-speed communication despite sharing the infrastructure with first layer services.
Solution Approach 2:
The system performs preliminary spectrum sensing and channel assessment before allocating channels to special communication services. The central management server proactively identifies suitable channels and prepares allocation decisions in advance, ensuring that when special communication traffic arises, immediately available high-quality channels can be assigned without delay, maintaining communication speed.
3Productivity
If channels are allocated to lower-level layers, then resource utilization is improved, but interference with upper-level layers increases
Solution Approach 1:
The patent implements a feedback mechanism where the central management server continuously receives channel usage information from both first layer (public) and second layer (special communication) services. Based on this feedback, the server monitors interference levels and dynamically adjusts channel allocations. When interference thresholds are exceeded, the system automatically reassigns channels to lower-utilization frequencies, balancing resource utilization with interference control.
Solution Approach 2:
The system changes operational parameters such as transmission power levels, modulation schemes, and channel frequencies based on real-time interference conditions. When lower-level layer transmissions cause harmful interference to upper-level layers, the central management server adjusts transmission parameters to reduce interference while maintaining acceptable resource utilization, such as lowering power levels or switching to less congested frequency bands.
Data Source
AI summary
A central management server for special communication may include: a spectrum sensing information acquisition unit for acquiring spectrum sensing information from spectrum sensing servers; an OP map generation unit for generating an OP value for each channel if there is an access request from a second layer; and a channel allocation unit configured to allocate a channel based on the OP value to a user terminal of the second layer requesting access if there is an access request from the second layer. The channel allocation unit may allocate a channel corresponding to the highest OP value from among the available channels, if there are available channels unused by both a first layer and a lower-level layer, and may select and allocate a channel unused by the first layer but used by the lower-level layer, if there are no such available channels.