Spectrum Sharing Control for DAS Interoperability and Interference Reduction
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Solution Overview
Problem
There is a lack of a concrete method for controlling distributed antenna systems (DAS) within a spectrum sharing system, which can lead to interference issues when radio resources are shared without considering interoperability.
Innovation Solution
A method is provided for a spectrum sharing system to allocate shared radio resources by identifying whether radio service devices and DAS units interoperate through identification information, including RAT, operation parameters, and geographic location, and optimizing resource allocation based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shared radio resources are allocated without considering DAS interoperability, then resource allocation simplicity is maintained, but interference occurs between DAS and radio service devices
Solution Approach 1:
The system performs preliminary identification of DAS node units and radio service devices before resource allocation. The system controller obtains identification information from both DAS and radio service devices, determines their interoperating relationship in advance, and then allocates resources accordingly. This preliminary action prevents interference by ensuring DAS-specific resources are identified and protected before allocation conflicts can occur.
Solution Approach 2:
The system segments radio resources into DAS-specific resources and general radio resources based on identification information. By dividing the resource pool and allocating different types of resources to different entities, the system prevents interference between DAS and radio service devices while maintaining efficient resource utilization.
2Measurement precision
If identification information is collected and processed to determine interoperating relationships, then resource allocation accuracy is improved, but system complexity increases
Solution Approach 1:
The system controller performs multiple functions using a unified identification mechanism. It obtains identification information, determines interoperating relationships, and allocates resources all through the same controller entity. This multi-functional approach improves detection accuracy while avoiding the need for separate specialized components that would increase overall system complexity.
Solution Approach 2:
The system controller acts as an intermediary that centralizes the processing of identification information and interoperability determination. By consolidating these functions in a single mediator entity rather than distributing them across multiple components, the system achieves accurate interoperating detection without proportionally increasing system complexity.
3Adaptability or versatility
If DAS is integrated into spectrum sharing system without specific control methods, then system integration is simplified, but radio resource interference occurs
Solution Approach 1:
The system applies different quality rules to different resources based on their nature. DAS-specific resources receive protected status to prevent interference, while general radio resources follow standard allocation procedures. This localized differentiation ensures reliable radio resource protection while maintaining overall system integration and adaptability.
Solution Approach 2:
The system dynamically determines interoperating relationships between DAS and radio service devices based on obtained identification information. Rather than using static configuration, the system adapts its resource allocation behavior in real-time based on the detected interoperating status, ensuring both integration flexibility and interference protection.
Data Source
AI summary
The present disclosure provides a method of allocating shared radio resources in a spectrum shared system (SSS), the method including: obtaining, by a system controller of the SSS, identification information from at least one radio service device of the SSS and a node unit of a distributed antenna system (DAS); determining, by the system controller of the SSS, whether the at least one radio service device interoperates with the DAS based on the identification information; and allocating, by the system controller of the SSS, the shared radio resources to the at least one radio service device and the DAS, respectively, based on a result of the determining of interoperating.