Shared Radio Unit Sub-Bands for Non-Static TDD Interference Control
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Solution Overview
Problem
In shared radio unit architectures, non-static time division duplexing (TDD) is challenging due to cross-link interference (CLI) between neighboring guest operators, making it impractical to implement dynamic or semi-static DL:UL ratios, which are essential for optimizing network performance based on traffic patterns.
Innovation Solution
A shared RU architecture that supports non-static DL:UL ratios by dividing frequency bands into sub-bands and assigning each sub-band to a respective guest operator, using CLI management techniques to minimize interference, and dynamically allocating bandwidth based on lease agreements and network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-static TDD is implemented in shared radio unit architectures, then network performance optimization based on traffic patterns is improved, but cross-link interference between neighboring guest operators worsens
Solution Approach 1:
The patent divides the frequency band into multiple sub-bands and assigns each sub-band to a specific guest operator. This segmentation allows each operator to have dedicated frequency resources while sharing the radio unit infrastructure, thereby reducing cross-link interference between operators while still enabling non-static TDD within each operator's allocated sub-band for traffic pattern optimization.
Solution Approach 2:
The patent implements different DL:UL ratios for different sub-bands assigned to different guest operators based on their specific traffic patterns and requirements. Each operator can optimize their local configuration independently, allowing non-static TDD adaptation to traffic conditions while maintaining isolated interference management within each operator's allocated frequency resources.
2Adaptability or versatility
If dynamic or semi-static DL:UL ratios are used, then adaptability to traffic patterns is improved, but implementation complexity in shared architectures worsens
Solution Approach 1:
By segmenting the frequency band into sub-bands and assigning each to a specific guest operator, the patent simplifies the implementation of non-static TDD. Each operator manages their own sub-band independently with their own DL:UL ratios, avoiding the complexity of coordinating dynamic ratio changes across multiple operators in a shared architecture.
Solution Approach 2:
The patent enables dynamic or semi-static DL:UL ratios within each guest operator's allocated sub-band, allowing adaptability to traffic patterns. The system maintains flexibility by permitting each operator to adjust their time division duplexing configuration independently based on their traffic conditions, while the overall shared architecture remains manageable through clear frequency separation.
Data Source
AI summary
Technologies for shared radio unit (RU) architectures supporting non-static time division duplexing (TDD) are described. One method includes receiving, from a guest operator assigned to a sub-band of a frequency band of a telecommunications network implementing a shared radio unit architecture, a request to modify a downlink to uplink ratio associated with the sub-band to implement time division duplexing, and modifying the downlink to uplink ratio.