Dynamic Spectrum Sharing via eNodeB Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for managing radio spectrum sharing between networks result in static spectrum allocation and large guard bands, leading to interference and inefficient use of spectrum, particularly between mobile and broadcasting networks, due to lack of dynamic sharing and unclear priority access rules.
Innovation Solution
A method for dynamic spectrum sharing between networks involves affiliating systems with a server to communicate sharing rules, identifying constrained and unconstrained systems, and allocating spectrum sub-bands based on geographical areas, using OFDM modulation with variable bandwidth and inserting guard bands as needed, to optimize spectrum use without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static spectrum management with guard bands is used, then interference between networks is reduced, but spectrum efficiency deteriorates and large guard bands are required
Solution Approach 1:
The patent implements dynamic spectrum management where the eNodeB continuously monitors spectrum usage and dynamically adjusts transmission parameters including power levels, modulation schemes, and resource allocation. This dynamic adaptation allows the system to optimize spectrum efficiency while maintaining interference protection, resolving the contradiction between reliability and productivity by replacing static guard bands with active, real-time spectrum management.
Solution Approach 2:
The system employs feedback mechanisms where the eNodeB receives information about spectrum usage conditions from multiple eNodeBs and dynamically adjusts transmission parameters based on this feedback. This closed-loop control enables the system to maintain reliable communication while efficiently utilizing spectrum resources, addressing the contradiction by continuously optimizing performance based on actual spectrum conditions.
2Productivity
If cognitive radio approaches are used, then spectrum utilization is improved, but system complexity increases and priority rules are undefined
Solution Approach 1:
The patent introduces the eNodeB as an intermediary entity that manages spectrum access and coordination between different networks. Rather than requiring complex distributed cognitive radio systems, the eNodeB acts as a centralized controller that handles spectrum monitoring, decision-making, and coordination, thereby improving spectrum utilization while avoiding the complexity of fully distributed cognitive radio approaches.
Solution Approach 2:
The system manages spectrum sharing by dynamically changing transmission parameters such as power levels, modulation schemes, and resource allocation blocks. This parameter-based approach allows for flexible spectrum utilization without requiring complex system architecture, resolving the contradiction by achieving improved productivity through parameter optimization rather than system complexity.
3Adaptability or versatility
If LTE broadcast sub-network is used, then spectrum sharing within single system is enabled, but inter-system sharing capability is limited
Solution Approach 1:
The patent extends the LTE broadcast sub-network concept to support multiple network types (LTE, UMTS, GSM) sharing spectrum resources. The eNodeB is configured to manage broadcast sub-networks across different network technologies, enabling universal spectrum sharing capability. This multi-functional approach improves adaptability by allowing a single system to handle various network types while maintaining manageable complexity through standardized procedures.
Solution Approach 2:
The system segments spectrum resources into dedicated blocks for different network types and geographical areas. By dividing the spectrum into manageable segments that can be independently managed, the system achieves versatile inter-system sharing capability while reducing configuration complexity through modular, segmented management rather than monolithic control.
Data Source
Figure 1
Figure 2~3
AI summary
A method for sharing spectrum in a communication network comprising at least two systems operating in frequency ranges that may at least partially overlap and in the same geographical area, characterized in that it comprises at least the following steps: • affiliate the first and second systems to a server • determine if there is a constrained system and if so, allocate said constrained system a first spectrum band, for a given geographical area, • carry out this allocation for all geographical areas covered by the two systems, • Identify the unconstrained systems and, by applying priority rules and sub-band management, allocate for each of the unconstrained systems and each defined geographical area, a spectrum band for each of the systems, and in the case where it is impossible to find a sub-band of spectrum, generate an alarm.