Self-Optimized Distributed Antenna System Interference Management
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Solution Overview
Problem
Distributed antenna systems (DAS) face challenges in optimizing signal distribution and interference management in low-coverage areas, particularly due to interference from macrocell signals and the need for centralized network planning.
Innovation Solution
The implementation of a self-optimized network (SON) capability in DAS, which includes detecting interference, modifying transmission, identifying free frequencies, and using algorithms to minimize interference, along with a multi-base transceiver station (MB-DAS) architecture that allows for easy configuration and synchronization of BTS cards, enabling decentralized planning and efficient signal distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized network planning is used for DAS configuration, then system reliability is improved, but device complexity and planning difficulty increase
Solution Approach 1:
The patent implements self-optimized network (SON) capabilities that enable the DAS to automatically detect interference, identify free frequencies, and configure its own parameters without requiring centralized network planning. The system performs self-measurement of interference levels, self-selection of optimal frequencies, and self-configuration of transmission parameters, thereby eliminating the need for complex centralized planning while maintaining reliable operation.
2Device complexity
If interference from macrocell signals is not addressed, then device complexity is reduced, but signal quality and coverage reliability deteriorate
Solution Approach 1:
The patent employs feedback mechanisms where the DAS continuously monitors interference levels from macrocell signals, measures signal quality metrics, and adjusts its transmission parameters accordingly. The system receives feedback about interference conditions and automatically modifies its operation to optimize signal coverage and quality, thereby maintaining reliability without requiring complex manual interference management.
Solution Approach 2:
The system dynamically changes operational parameters such as transmission frequency, power levels, and timing based on detected interference conditions. By automatically adjusting these parameters in response to macrocell interference, the DAS maintains optimal signal quality and coverage reliability while keeping the management system relatively simple.
3Reliability
If conventional BTS installation is required for coverage extension, then infrastructure reliability is improved, but ease of manufacture and deployment deteriorate
Solution Approach 1:
The patent segments the BTS functionality into distributed antenna units that can be independently deployed without requiring installation of conventional BTS infrastructure. The system divides the coverage area into multiple zones served by distributed units, each capable of independent operation, thereby maintaining infrastructure reliability while significantly easing deployment requirements and manufacturing complexity.
Data Source
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AI summary
Systems and methods for optimized telecommunications distribution are provided. For example, a distributed antenna system can include a master unit for transceiving signals with remote units operable for wirelessly transceiving signals with mobile devices in a coverage area. A self-optimized network analyzer can be in a unit of the distributed antenna system. A self-optimized network controller in the distributed antenna system can output commands for changing operation of a component in the distributed antenna system in response to analysis results from the self-optimized network analyzer. In some aspects, the master unit includes base transceiver station cards for receiving call information in network protocol data from a network and for generating digital signals including the call information from the network protocol data for distribution to the remote units.